CVE-2026-120019mediumCWE-79

CVE-2026-120019: medium-severity vulnerability in boldgrid W3 Total Cache

W3 Total Cache <= 2.10.7 - Unauthenticated Stored Cross-Site Scripting via Comment Content via Predictable Minify Placeholder

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33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 5.4epss 0.2%
from disclosure to weapon4 days
Published on NVDOct 31
1st PoC+4d
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Affected products
boldgrid · W3 Total Cache
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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