phpMyAdmin does not apply any special security methods to the MySQL database server. It is still the system administrator’s job to grant permissions on the MySQL databases properly. phpMyAdmin’s Users page can be used for this.
Warning
Mac users should note that if you are on a version before Mac OS X, StuffIt unstuffs with Mac formats. So you’ll have to resave as in BBEdit to Unix style ALL phpMyAdmin scripts before uploading them to your server, as PHP seems not to like Mac-style end of lines character (“\r”).
phpMyAdmin is included in most Linux distributions. It is recommended to use distribution packages when possible - they usually provide integration to your distribution and you will automatically get security updates from your distribution.
Debian’s package repositories include a phpMyAdmin package, but be aware that the configuration file is maintained in /etc/phpmyadmin and may differ in some ways from the official phpMyAdmin documentation.
OpenSUSE already comes with phpMyAdmin package, just install packages from the openSUSE Build Service.
Ubuntu ships phpMyAdmin package, however if you want to use recent version, you can use packages from PPA for Michal Čihař.
Gentoo ships the phpMyAdmin package, both in a near stock configuration as well as in a webapp-config configuration. Use emerge dev-db/phpmyadmin to install.
Mandriva ships the phpMyAdmin package in their contrib branch and can be installed via the usual Control Center.
Fedora ships the phpMyAdmin package, but be aware that the configuration file is maintained in /etc/phpMyAdmin/ and may differ in some ways from the official phpMyAdmin documentation.
Red Hat Enterprise Linux itself and thus derivatives like CentOS don’t ship phpMyAdmin, but the Fedora-driven repository Extra Packages for Enterprise Linux (EPEL) is doing so, if it’s enabled. But be aware that the configuration file is maintained in /etc/phpMyAdmin/ and may differ in some ways from the official phpMyAdmin documentation.
The easiest way to get phpMyAdmin on Windows is using third party products which include phpMyAdmin together with a database and web server such as XAMPP.
You can find more of such options at Wikipedia.
You can install phpMyAdmin using Composer, however it’s currently not available in the default Packagist repository due to its technical limitations.
The installation is possible by adding our own repository <https://www.phpmyadmin.net/packages.json>:
composer create-project phpmyadmin/phpmyadmin --repository-url=https://www.phpmyadmin.net/packages.json --no-dev
phpMyAdmin comes with a Docker image, which you can easily deploy. You can download it using:
docker pull phpmyadmin/phpmyadmin
The phpMyAdmin server will be executed on port 80. It supports several ways of configuring the link to the database server, which you can manage using environment variables:
Allows you to enter database server hostname on login form (see $cfg['AllowArbitraryServer']).
Host name or IP address of the database server to use.
Comma separated host names or IP addresses of the database servers to use.
User name to use for Config authentication mode.
Password to use for Config authentication mode.
Port of the databse server to use.
The fully-qualified path (https://pma.example.net/) where the reverse proxy makes phpMyAdmin available.
By default, Cookie authentication mode is used, but if PMA_USER and PMA_PASSWORD are set, it is switched to Config authentication mode.
To connect phpMyAdmin to given server use:
docker run --name myadmin -d -e PMA_HOST=dbhost -p 8080:80 phpmyadmin/phpmyadmin
To connect phpMyAdmin to more servers use:
docker run --name myadmin -d -e PMA_HOSTS=dbhost1,dbhost2,dbhost3 -p 8080:80 phpmyadmin/phpmyadmin
To use arbitrary server option:
docker run --name myadmin -d --link mysql_db_server:db -p 8080:80 -e PMA_ARBITRARY=1 phpmyadmin/phpmyadmin
You can also link the database container using Docker:
docker run --name phpmyadmin -d --link mysql_db_server:db -p 8080:80 phpmyadmin/phpmyadmin
Alternatively you can also use docker-compose with the docker-compose.yml from <https://github.com/phpmyadmin/docker>. This will run phpMyAdmin with arbitrary server - allowing you to specify MySQL/MariaDB server on login page.
docker-compose up -d
To manually create the file, simply use your text editor to create the file config.inc.php (you can copy config.sample.inc.php to get a minimal configuration file) in the main (top-level) phpMyAdmin directory (the one that contains index.php). phpMyAdmin first loads libraries/config.default.php and then overrides those values with anything found in config.inc.php. If the default value is okay for a particular setting, there is no need to include it in config.inc.php. You’ll probably need only a few directives to get going; a simple configuration may look like this:
<?php
$cfg['blowfish_secret'] = 'ba17c1ec07d65003'; // use here a value of your choice
$i=0;
$i++;
$cfg['Servers'][$i]['auth_type'] = 'cookie';
?>
Or, if you prefer to not be prompted every time you log in:
<?php
$i=0;
$i++;
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = 'cbb74bc'; // use here your password
$cfg['Servers'][$i]['auth_type'] = 'config';
?>
For a full explanation of possible configuration values, see the Configuration of this document.
Instead of manually editing config.inc.php, you can use phpMyAdmin’s setup feature. First you must manually create a folder config in the phpMyAdmin directory. This is a security measure. On a Linux/Unix system you can use the following commands:
cd phpMyAdmin
mkdir config # create directory for saving
chmod o+rw config # give it world writable permissions
And to edit an existing configuration, copy it over first:
cp config.inc.php config/ # copy current configuration for editing
chmod o+w config/config.inc.php # give it world writable permissions
Note
Debian and Ubuntu have simplified this setup and all you need to do is to execute /usr/sbin/pma-configure.
On other platforms, simply create the folder and ensure that your web server has read and write access to it. 1.26 I just installed phpMyAdmin in my document root of IIS but I get the error “No input file specified” when trying to run phpMyAdmin. can help with this.
Next, open your browser and visit the location where you installed phpMyAdmin, with the /setup suffix. If you have an existing configuration, use the Load button to bring its content inside the setup panel. Note that changes are not saved to disk until you explicitly choose ``Save`` from the Configuration area of the screen. Normally the script saves the new config.inc.php to the config/ directory, but if the webserver does not have the proper permissions you may see the error “Cannot load or save configuration.” Ensure that the config/ directory exists and has the proper permissions - or use the Download link to save the config file locally and upload it (via FTP or some similar means) to the proper location.
Once the file has been saved, it must be moved out of the config/ directory and the permissions must be reset, again as a security measure:
mv config/config.inc.php . # move file to current directory
chmod o-rw config.inc.php # remove world read and write permissions
rm -rf config # remove not needed directory
Note
Debian and Ubuntu have simplified this setup and all you need to do is to execute /usr/sbin/pma-secure.
Now the file is ready to be used. You can choose to review or edit the file with your favorite editor, if you prefer to set some advanced options which the setup script does not provide.
Since July 2015 all phpMyAdmin releases are cryptographically signed by the releasing developer, who through January 2016 was Marc Delisle. His key id is 0x81AF644A, his PGP fingerprint is:
436F F188 4B1A 0C3F DCBF 0D79 FEFC 65D1 81AF 644A
and you can get more identification information from https://keybase.io/lem9.
Beginning in January 2016, the release manager is Isaac Bennetch. His key id is 0x8259BD92, and his PGP fingerprint is:
3D06 A59E CE73 0EB7 1B51 1C17 CE75 2F17 8259 BD92
and you can get more identification information from https://keybase.io/ibennetch.
You should verify that the signature matches the archive you have downloaded. This way you can be sure that you are using the same code that was released.
Each archive is accompanied with .asc files which contains the PGP signature for it. Once you have both of them in the same folder, you can verify the signature:
$ gpg --verify phpMyAdmin-4.5.4.1-all-languages.zip.asc
gpg: Signature made Fri 29 Jan 2016 08:59:37 AM EST using RSA key ID 8259BD92
gpg: Can't check signature: public key not found
As you can see gpg complains that it does not know the public key. At this point you should do one of the following steps:
$ gpg --import phpmyadmin.keyring
$ gpg --keyserver hkp://pgp.mit.edu --recv-keys 8259BD92
gpg: requesting key 8259BD92 from hkp server pgp.mit.edu
gpg: key 8259BD92: public key "Isaac Bennetch <bennetch@gmail.com>" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
This will improve the situation a bit - at this point you can verify that the signature from the given key is correct but you still can not trust the name used in the key:
$ gpg --verify phpMyAdmin-4.5.4.1-all-languages.zip.asc
gpg: Signature made Fri 29 Jan 2016 08:59:37 AM EST using RSA key ID 8259BD92
gpg: Good signature from "Isaac Bennetch <bennetch@gmail.com>"
gpg: aka "Isaac Bennetch <isaac@bennetch.org>"
gpg: WARNING: This key is not certified with a trusted signature!
gpg: There is no indication that the signature belongs to the owner.
Primary key fingerprint: 3D06 A59E CE73 0EB7 1B51 1C17 CE75 2F17 8259 BD92
The problem here is that anybody could issue the key with this name. You need to ensure that the key is actually owned by the mentioned person. The GNU Privacy Handbook covers this topic in the chapter Validating other keys on your public keyring. The most reliable method is to meet the developer in person and exchange key fingerprints, however you can also rely on the web of trust. This way you can trust the key transitively though signatures of others, who have met the developer in person. For example you can see how Isaac’s key links to Linus’s key.
Once the key is trusted, the warning will not occur:
$ gpg --verify phpMyAdmin-4.5.4.1-all-languages.zip.asc
gpg: Signature made Fri 29 Jan 2016 08:59:37 AM EST using RSA key ID 8259BD92
gpg: Good signature from "Isaac Bennetch <bennetch@gmail.com>" [full]
Should the signature be invalid (the archive has been changed), you would get a clear error regardless of the fact that the key is trusted or not:
$ gpg --verify phpMyAdmin-4.5.4.1-all-languages.zip.asc
gpg: Signature made Fri 29 Jan 2016 08:59:37 AM EST using RSA key ID 8259BD92
gpg: BAD signature from "Isaac Bennetch <bennetch@gmail.com>" [unknown]
For a whole set of additional features (bookmarks, comments, SQL-history, tracking mechanism, PDF-generation, column contents transformation, etc.) you need to create a set of special tables. Those tables can be located in your own database, or in a central database for a multi-user installation (this database would then be accessed by the controluser, so no other user should have rights to it).
In many cases, this database structure can be automatically created and configured. This is called “Zero Configuration” mode and can be particularly useful in shared hosting situations. “Zeroconf” mode is on by default, to disable set $cfg['ZeroConf'] to false.
The following three scenarios are covered by the Zero Configuration mode:
Please look at your ./sql/ directory, where you should find a file called create_tables.sql. (If you are using a Windows server, pay special attention to 1.23 I’m running MySQL on a Win32 machine. Each time I create a new table the table and column names are changed to lowercase!).
If you already had this infrastructure and:
and then create new tables by importing sql/create_tables.sql.
You can use your phpMyAdmin to create the tables for you. Please be aware that you may need special (administrator) privileges to create the database and tables, and that the script may need some tuning, depending on the database name.
After having imported the sql/create_tables.sql file, you should specify the table names in your config.inc.php file. The directives used for that can be found in the Configuration.
You will also need to have a controluser ($cfg['Servers'][$i]['controluser'] and $cfg['Servers'][$i]['controlpass'] settings) with the proper rights to those tables. For example you can create it using following statement:
GRANT SELECT, INSERT, UPDATE, DELETE ON <pma_db>.* TO 'pma'@'localhost' IDENTIFIED BY 'pmapass';
Warning
Never extract the new version over an existing installation of phpMyAdmin, always first remove the old files keeping just the configuration.
This way you will not leave old no longer working code in the directory, which can have severe security implications or can cause various breakages.
Simply copy config.inc.php from your previous installation into the newly unpacked one. Configuration files from old versions may require some tweaking as some options have been changed or removed. For compatibility with PHP 5.3 and later, remove a set_magic_quotes_runtime(0); statement that you might find near the end of your configuration file.
You should not copy libraries/config.default.php over config.inc.php because the default configuration file is version- specific.
If you have upgraded your MySQL server from a version previous to 4.1.2 to version 5.x or newer and if you use the phpMyAdmin configuration storage, you should run the SQL script found in sql/upgrade_tables_mysql_4_1_2+.sql.
If you have upgraded your phpMyAdmin to 4.3.0 or newer from 2.5.0 or newer (<= 4.2.x) and if you use the phpMyAdmin configuration storage, you should run the SQL script found in sql/upgrade_column_info_4_3_0+.sql.
Do not forget to clear the browser cache and to empty the old session by logging out and logging in again.
HTTP and cookie authentication modes are recommended in a multi-user environment where you want to give users access to their own database and don’t want them to play around with others. Nevertheless be aware that MS Internet Explorer seems to be really buggy about cookies, at least till version 6. Even in a single-user environment, you might prefer to use HTTP or cookie mode so that your user/password pair are not in clear in the configuration file.
HTTP and cookie authentication modes are more secure: the MySQL login information does not need to be set in the phpMyAdmin configuration file (except possibly for the $cfg['Servers'][$i]['controluser']). However, keep in mind that the password travels in plain text, unless you are using the HTTPS protocol. In cookie mode, the password is stored, encrypted with the AES algorithm, in a temporary cookie.
Then each of the true users should be granted a set of privileges on a set of particular databases. Normally you shouldn’t give global privileges to an ordinary user, unless you understand the impact of those privileges (for example, you are creating a superuser). For example, to grant the user real_user with all privileges on the database user_base:
GRANT ALL PRIVILEGES ON user_base.* TO 'real_user'@localhost IDENTIFIED BY 'real_password';
What the user may now do is controlled entirely by the MySQL user management system. With HTTP or cookie authentication mode, you don’t need to fill the user/password fields inside the $cfg['Servers'].
Uses HTTP Basic authentication method and allows you to log in as any valid MySQL user.
Is supported with most PHP configurations. For IIS (ISAPI) support using CGI PHP see 1.32 Can I use HTTP authentication with IIS?, for using with Apache CGI see 1.35 Can I use HTTP authentication with Apache CGI?.
When PHP is running under Apache’s mod_proxy_fcgi (e.g. with PHP-FPM), Authorization headers are not passed to the underlying FCGI application, such that your credentials will not reach the application. In this case, you can add the following configuration directive:
SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=$1
See also 4.4 phpMyAdmin always gives “Access denied” when using HTTP authentication. about not using the .htaccess mechanism along with ‘HTTP‘ authentication mode.
The very basic example of saving credentials in a session is available as examples/signon.php:
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Single signon for phpMyAdmin
*
* This is just example how to use session based single signon with
* phpMyAdmin, it is not intended to be perfect code and look, only
* shows how you can integrate this functionality in your application.
*
* @package PhpMyAdmin
* @subpackage Example
*/
/* Need to have cookie visible from parent directory */
session_set_cookie_params(0, '/', '', false);
/* Create signon session */
$session_name = 'SignonSession';
session_name($session_name);
// Uncomment and change the following line to match your $cfg['SessionSavePath']
//session_save_path('/foobar');
session_start();
/* Was data posted? */
if (isset($_POST['user'])) {
/* Store there credentials */
$_SESSION['PMA_single_signon_user'] = $_POST['user'];
$_SESSION['PMA_single_signon_password'] = $_POST['password'];
$_SESSION['PMA_single_signon_host'] = $_POST['host'];
$_SESSION['PMA_single_signon_port'] = $_POST['port'];
/* Update another field of server configuration */
$_SESSION['PMA_single_signon_cfgupdate'] = array('verbose' => 'Signon test');
$id = session_id();
/* Close that session */
session_write_close();
/* Redirect to phpMyAdmin (should use absolute URL here!) */
header('Location: ../index.php');
} else {
/* Show simple form */
header('Content-Type: text/html; charset=utf-8');
echo '<?xml version="1.0" encoding="utf-8"?>' , "\n";
?>
<!DOCTYPE HTML>
<html lang="en" dir="ltr">
<head>
<link rel="icon" href="../favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" />
<meta charset="utf-8" />
<title>phpMyAdmin single signon example</title>
</head>
<body>
<?php
if (isset($_SESSION['PMA_single_signon_error_message'])) {
echo '<p class="error">';
echo $_SESSION['PMA_single_signon_error_message'];
echo '</p>';
}
?>
<form action="signon.php" method="post">
Username: <input type="text" name="user" /><br />
Password: <input type="password" name="password" /><br />
Host: (will use the one from config.inc.php by default)
<input type="text" name="host" /><br />
Port: (will use the one from config.inc.php by default)
<input type="text" name="port" /><br />
<input type="submit" />
</form>
</body>
</html>
<?php
}
?>
Alternatively you can also use this way to integrate with OpenID as shown in examples/openid.php:
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Single signon for phpMyAdmin using OpenID
*
* This is just example how to use single signon with phpMyAdmin, it is
* not intended to be perfect code and look, only shows how you can
* integrate this functionality in your application.
*
* It uses OpenID pear package, see https://pear.php.net/package/OpenID
*
* User first authenticates using OpenID and based on content of $AUTH_MAP
* the login information is passed to phpMyAdmin in session data.
*
* @package PhpMyAdmin
* @subpackage Example
*/
if (false === @include_once 'OpenID/RelyingParty.php') {
exit;
}
/**
* Map of authenticated users to MySQL user/password pairs.
*/
$AUTH_MAP = array(
'https://launchpad.net/~username' => array(
'user' => 'root',
'password' => '',
),
);
/**
* Simple function to show HTML page with given content.
*
* @param string $contents Content to include in page
*
* @return void
*/
function Show_page($contents)
{
header('Content-Type: text/html; charset=utf-8');
echo '<?xml version="1.0" encoding="utf-8"?>' , "\n";
?>
<!DOCTYPE HTML>
<html lang="en" dir="ltr">
<head>
<link rel="icon" href="../favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" />
<meta charset="utf-8" />
<title>phpMyAdmin OpenID signon example</title>
</head>
<body>
<?php
if (isset($_SESSION) && isset($_SESSION['PMA_single_signon_error_message'])) {
echo '<p class="error">' , $_SESSION['PMA_single_signon_message'] , '</p>';
unset($_SESSION['PMA_single_signon_message']);
}
echo $contents;
?>
</body>
</html>
<?php
}
function Die_error($e)
{
$contents = "<div class='relyingparty_results'>\n";
$contents .= "<pre>" . htmlspecialchars($e->getMessage()) . "</pre>\n";
$contents .= "</div class='relyingparty_results'>";
Show_page($contents);
exit;
}
/* Need to have cookie visible from parent directory */
session_set_cookie_params(0, '/', '', false);
/* Create signon session */
$session_name = 'SignonSession';
session_name($session_name);
session_start();
// Determine realm and return_to
$base = 'http';
if (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
$base .= 's';
}
$base .= '://' . $_SERVER['SERVER_NAME'] . ':' . $_SERVER['SERVER_PORT'];
$realm = $base . '/';
$returnTo = $base . dirname($_SERVER['PHP_SELF']);
if ($returnTo[mb_strlen($returnTo) - 1] != '/') {
$returnTo .= '/';
}
$returnTo .= 'openid.php';
/* Display form */
if (!count($_GET) && !count($_POST) || isset($_GET['phpMyAdmin'])) {
/* Show simple form */
$content = '<form action="openid.php" method="post">
OpenID: <input type="text" name="identifier" /><br />
<input type="submit" name="start" />
</form>
</body>
</html>';
Show_page($content);
exit;
}
/* Grab identifier */
if (isset($_POST['identifier']) && is_string($_POST['identifier'])) {
$identifier = $_POST['identifier'];
} else if (isset($_SESSION['identifier']) && is_string($_SESSION['identifier'])) {
$identifier = $_SESSION['identifier'];
} else {
$identifier = null;
}
/* Create OpenID object */
try {
$o = new OpenID_RelyingParty($returnTo, $realm, $identifier);
} catch (Exception $e) {
Die_error($e);
}
/* Redirect to OpenID provider */
if (isset($_POST['start'])) {
try {
$authRequest = $o->prepare();
} catch (Exception $e) {
Die_error($e);
}
$url = $authRequest->getAuthorizeURL();
header("Location: $url");
exit;
} else {
/* Grab query string */
if (!count($_POST)) {
list(, $queryString) = explode('?', $_SERVER['REQUEST_URI']);
} else {
// I hate php sometimes
$queryString = file_get_contents('php://input');
}
/* Check reply */
try {
$message = new OpenID_Message($queryString, OpenID_Message::FORMAT_HTTP);
} catch (Exception $e) {
Die_error($e);
}
$id = $message->get('openid.claimed_id');
if (!empty($id) && isset($AUTH_MAP[$id])) {
$_SESSION['PMA_single_signon_user'] = $AUTH_MAP[$id]['user'];
$_SESSION['PMA_single_signon_password'] = $AUTH_MAP[$id]['password'];
session_write_close();
/* Redirect to phpMyAdmin (should use absolute URL here!) */
header('Location: ../index.php');
} else {
Show_page('<p>User not allowed!</p>');
exit;
}
}
If you intend to pass the credentials using some other means than, you have to implement wrapper in PHP to get that data and set it to $cfg['Servers'][$i]['SignonScript']. There is very minimal example in examples/signon-script.php:
<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Single signon for phpMyAdmin
*
* This is just example how to use script based single signon with
* phpMyAdmin, it is not intended to be perfect code and look, only
* shows how you can integrate this functionality in your application.
*
* @package PhpMyAdmin
* @subpackage Example
*/
/**
* This function returns username and password.
*
* It can optionally use configured username as parameter.
*
* @param string $user User name
*
* @return array
*/
function get_login_credentials($user)
{
/* Optionally we can use passed username */
if (!empty($user)) {
return array($user, 'password');
}
/* Here we would retrieve the credentials */
$credentials = array('root', '');
return $credentials;
}
The Swekey is a low cost authentication USB key that can be used in web applications. When Swekey authentication is activated, phpMyAdmin requires the users’s Swekey to be plugged before entering the login page (currently supported for cookie authentication mode only). Swekey Authentication is disabled by default. To enable it, add the following line to config.inc.php:
$cfg['Servers'][$i]['auth_swekey_config'] = '/etc/swekey.conf';
You then have to create the swekey.conf file that will associate each user with their Swekey Id. It is important to place this file outside of your web server’s document root (in the example, it is located in /etc). Feel free to use it with your own users’ information. If you want to purchase a Swekey please visit https://www.phpmyadmin.net/auth_key/ since this link provides funding for phpMyAdmin.
A self documented sample file is provided in the file examples/swekey.sample.conf:
# This is a typical file used to enable Swekey hardware authentication.
#
# To activate the Swekey authentication add the following line to your config.inc.php file.
# $cfg['Servers'][$i]['auth_swekey_config'] = '/etc/swekey-pma.conf';
# Then rename this file "swekey-pma.conf" and copy it to the /etc directory.
# Add all the Swekey ids you want to grant access to in the file.
# After each Swekey id put the corresponding user name.
#
# If you don't know the id of a Swekey just visit http://www.swekey.com?sel=support
# while your Swekey is connected.
#
# If you need to purchase a Swekey please visit https://www.phpmyadmin.net/auth_key/
# since this link provides funding to PhpMyAdmin.
#
0000000000000000000000000000763A:root
000000000000000000000000000089E4:steve
0000000000000000000000000000231E:scott
#
# It is recommended to include the following lines to contact the
# authentication servers in SSL mode.
#
SERVER_CHECK=https://auth-check-ssl.musbe.net
SERVER_RNDTOKEN=https://auth-rnd-gen-ssl.musbe.net
SERVER_STATUS=https://auth-status-ssl.musbe.net
#
# The path of the root certificate file used to ensure a secure
# communication with the authentication servers in SSL mode.
# If not specified, will use musbe-ca.crt found in your
# phpMyAdmin/libraries/auth/swekey.
#
#CA_FILE=/var/http-root/phpmyadmin/libraries/auth/swekey/musbe-ca.crt
#
# If your server receives many login requests, you can enable the random
# token caching to accelerate the authentication process.
# Token caching is enabled by default.
#
#ENABLE_TOKEN_CACHE=0
The phpMyAdmin team tries hard to make the application secure, however there are always ways to make your installation more secure:
Serve phpMyAdmin on HTTPS only. Preferably, you should use HSTS as well, so that you’re protected from protocol downgrade attacks.
Remove the setup directory from phpMyAdmin, you will probably not use it after the initial setup.
Properly choose an authentication method - Cookie authentication mode is probably the best choice for shared hosting.
In case you don’t want all MySQL users to be able to access phpMyAdmin, you can use $cfg['Servers'][$i]['AllowDeny']['rules'] to limit them.
Consider hiding phpMyAdmin behind an authentication proxy, so that users need to authenticate prior to providing MySQL credentials to phpMyAdmin. You can achieve this by configuring your web server to request HTTP authentication. For example in Apache this can be done with:
AuthType Basic
AuthName "Restricted Access"
AuthUserFile /usr/share/phpmyadmin/passwd
Require valid-user
Once you have changed the configuration, you need to create a list of users which can authenticate. This can be done using the htpasswd utility:
htpasswd -c /usr/share/phpmyadmin/passwd username
If you are afraid of automated attacks, enabling Captcha by $cfg['CaptchaLoginPublicKey'] and $cfg['CaptchaLoginPrivateKey'] might be an option.
If a user has only column-specific privileges on some (but not all) columns in a table, “Browse” will fail with an error message.
As a workaround, a bookmarked query with the same name as the table can be created, this will run when using the “Browse” link instead. Issue 11922.
When using the ‘http’ auth_type, it can be impossible to log back in (when the logout comes manually or after a period of inactivity). Issue 11898.