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CVE-2026-18051

CRITICAL 10.0 CVSS 3.1
Published
August 19, 2026
Last modified
November 9, 2026
NVD status
Deferred
Reported by
contact@wpscan.com
Weakness
CWE-22
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H

Description

The W3 Total Cache WordPress plugin before 2.10.5 does not properly validate the request path it uses to build cache file names, allowing unauthenticated attackers to write a file into any existing directory on the server, inside or outside the web root, overwriting whatever occupies the target name. On Apache, the same flaw overwrites the site's .htaccess files, which breaks the site and can strip hardening rules that other security measures rely on.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • Unknown W3 Total Cache — Before 2.10.5

References

  • wpscan.com https://wpscan.com/vulnerability/dc56cdd2-419b-4a64-9d2a-29dc7e79cb6d/
  • nvd.nist.gov Official NVD record