CVE-2026-78438 W3 Total Cache <= 2.10.5 - Unauthenticated Stored Cross-Site Scripting via LazyLoad Background Mutator

The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via LazyLoad Background Mutator in all versions up to, and including, 2.10.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to...

CVE-2026-78438: Improper Neutralization of Input During Web Page Generation

The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via LazyLoad Background Mutator in all versions up to, and including, 2.10.5 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to...

PT-2026-86335

If you run a WordPress site, you gotta stop whatever you are doing and check your dashboard immediately. So I was just looking through the Wordfence database and found a crazy vulnerability in W3 Total Cache, that huge plugin with almost a million active installs. We are talking about an...