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CVE-2026-120019

MEDIUM 5.4 CVSS 3.1
Published
October 31, 2026
Last modified
November 2, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 2.10.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires HTML Minify to be enabled with the default 'mfunc' entry present in the ignored-comment stems list, and exploitation depends on the attacker predicting the md5(time()) placeholder namespace by reading the server clock via the HTTP Date response header within the applicable time window.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • boldgrid W3 Total Cache — Up to and including 2.10.7

References

  • github.com https://github.com/BoldGrid/w3-total-cache/commit/35c6896332aff6b41888db0595cf09b4c98c814c
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.7/Minify_Plugin.php#L625
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.7/lib/Minify/Minify/IgnoredCommentPreserver.php#L10
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.7/lib/Minify/Minify/IgnoredCommentPreserver.php#L25
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3757452/w3-total-cache/trunk/lib/Minify/Minify/IgnoredCommentPreserver.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/3a14a537-64e7-415b-be8e-a3a9377fd20d?source=cve
  • nvd.nist.gov Official NVD record