CVE-2026-87920
HIGH
7,2
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Description
AI Translation Available
The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Output-Buffer Regex Rewrite in all versions up to, and including, 2.10.6 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 vulnerability is only exploitable when the 'Remove query strings from static resources' option is enabled in W3 Total Cache, as mutate_url() must strip the '?' delimiter and everything following it — including the closing quote of the outer attribute — to break the attribute boundary.
79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
StableCommon Consequences
Security Scopes Affected:
Access Control
Confidentiality
Integrity
Availability
Potential Impacts:
Bypass Protection Mechanism
Read Application Data
Execute Unauthorized Code Or Commands
Applicable Platforms
Technologies:
AI/ML, Web Based, Web Server
https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCa…
https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCa…
https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.10.6/BrowserCa…
https://plugins.trac.wordpress.org/changeset/3723494/w3-total-cache/trunk/Brows…
https://plugins.trac.wordpress.org/changeset?reponame=&new=3723494%40w3-total-c…
https://www.wordfence.com/threat-intel/vulnerabilities/id/34bd7c32-f4c5-4015-90…