CVE-2026-120019 The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-120019?
CVE-2026-120019 is a medium-severity vulnerability in boldgrid W3 Total Cache, published on 31 Oct 2026.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-120019?
How do I fix CVE-2026-120019?
No fix has been published for CVE-2026-120019 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-120019 being exploited?
There is no known exploitation of CVE-2026-120019 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-59h3-w5qx-76fv.