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.
History

Wed, 22 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 22 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Chsxf
Chsxf mcatfilter
Wordpress
Wordpress wordpress
Vendors & Products Chsxf
Chsxf mcatfilter
Wordpress
Wordpress wordpress

Wed, 22 Apr 2026 08:30:00 +0000

Type Values Removed Values Added
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.
Title mCatFilter <= 0.5.2 - Cross-Site Request Forgery via compute_post() Function
Weaknesses CWE-352
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-04-22T07:45:36.467Z

Updated: 2026-04-22T15:31:40.591Z

Reserved: 2026-03-13T15:29:31.027Z

Link: CVE-2026-4139

cve-icon Vulnrichment

Updated: 2026-04-22T15:25:49.922Z

cve-icon NVD

Status : Deferred

Published: 2026-04-22T09:16:24.707

Modified: 2026-04-22T20:22:50.570

Link: CVE-2026-4139

cve-icon Redhat

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