Description
The MaxiBlocks Builder plugin for WordPress is vulnerable to arbitrary media file deletion due to insufficient file ownership validation on the 'maxi_remove_custom_image_size' AJAX action in all versions up to, and including, 2.1.8. This makes it possible for authenticated attackers, with Author-level access and above, to delete arbitrary files in the wp-content/uploads directory, including files uploaded by other users and administrators.
References6
- github.com/maxi-blocks/maxi-blocks/commit/3dff1db57bfb4e6c14fa7…
- plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.7/core/…
- plugins.trac.wordpress.org/browser/maxi-blocks/trunk/core/class…
- plugins.trac.wordpress.org/changeset/3476709/maxi-blocks/trunk/…
- plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&repo…
- www.wordfence.com/threat-intel/vulnerabilities/id/f50c31df-56d0…
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 25 · as of 13 November 2026
- CWE
- CWE-639
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.