Description

The Easy PHP Settings plugin for WordPress is vulnerable to PHP Code Injection in all versions up to, and including, 1.0.4 via the `update_wp_memory_constants()` method. This is due to insufficient input validation on the `wp_memory_limit` and `wp_max_memory_limit` settings before writing them to `wp-config.php`. The `sanitize_text_field()` function used for sanitization does not filter single quotes, allowing an attacker to break out of the string context in a PHP `define()` statement. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject and execute arbitrary PHP code on the server by modifying `wp-config.php`, which is loaded on every page request.

Weaknesses 1

References 4

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-php-settings/tags/1.0.4/class-easy-php-settings.php#L1800
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-php-settings/tags/1.0.5/class-easy-php-settings.php#L1998
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/easy-php-settings/trunk/class-easy-php-settings.php#L1800
• wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/f9927487-99fb-46d9-a208-f19e0a371267?source=cve

Remediation