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.
References7
- plugins.trac.wordpress.org/browser/mcatfilter/tags/0.5.2/mcatfi…
- plugins.trac.wordpress.org/browser/mcatfilter/tags/0.5.2/mcatfi…
- plugins.trac.wordpress.org/browser/mcatfilter/tags/0.5.2/mcatfi…
- plugins.trac.wordpress.org/browser/mcatfilter/trunk/mcatfilter.…
- plugins.trac.wordpress.org/browser/mcatfilter/trunk/mcatfilter.…
- plugins.trac.wordpress.org/browser/mcatfilter/trunk/mcatfilter.…
- www.wordfence.com/threat-intel/vulnerabilities/id/622ee6c8-7739…
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 6 · as of 13 November 2026
- CWE
- CWE-352
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.