CVE-2026-120019 Details
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.
A stored cross-site scripting vulnerability has been identified in the W3 Total Cache plugin for WordPress, affecting all versions through 2.10.7. The issue arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary scripts into pages. These scripts execute when users access the compromised pages. Exploitation requires the HTML Minify feature to be active, with the default 'mfunc' entry in the ignored-comment stems list. Additionally, attackers must predict the md5(time()) placeholder namespace by reading the server clock via the HTTP Date header, within a specific time window.
Users can update to W3 Total Cache version 2.11.0 or later, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 31, 2026CISA-ADP
Assessed Nov 1, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| W3 Total Cache | <= 2.10.7 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 1, 2026 | CVE Modified | CISA-ADP |
| Oct 31, 2026 | New CVE Received | [email protected] |