Description

The mCatFilter plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to and including 0.5.2. This is due to the complete absence of nonce verification and capability checks in the compute_post() function, which processes settings updates. The compute_post() function is called in the plugin constructor on every page load via the plugins_loaded hook, and it directly processes $_POST data to modify plugin settings via update_option() without any CSRF token validation. This makes it possible for unauthenticated attackers to modify all plugin settings, including category exclusion rules, feed exclusion flags, and tag page exclusion flags, via a forged POST request, granted they can trick a site administrator into performing an action such as clicking a link.

Weaknesses 1

References 7

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/mcatfilter/tags/0.5.2/mcatfilter.php#L138
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/mcatfilter/tags/0.5.2/mcatfilter.php#L320
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/mcatfilter/tags/0.5.2/mcatfilter.php#L339
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/mcatfilter/trunk/mcatfilter.php#L138
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/mcatfilter/trunk/mcatfilter.php#L320
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/mcatfilter/trunk/mcatfilter.php#L339
• wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/622ee6c8-7739-44ae-b88f-63a93c0a9b20?source=cve

Remediation