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10.0 Critical

CVE-2026-18051 The W3 Total Cache WordPress plugin before 2.10.5 does not properly validate the request path it uses to build cache…

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 products and versions

Product Affected versions Fixed in
W3 Total Cache 2.10 earliest → < 2.10.5 2.10.5

Other CVEs of W3 Total Cache

The 3 CVEs of W3 Total Cache →
CVE-2026-107321 The W3 Total Cache WordPress plugin before 2.10.6 does not confine a media-import file copy to the document root, nor… 5.4 Medium CVE-2025-9501 The W3 Total Cache WordPress plugin before 2.8.13 is vulnerable to command injection via the _parse_dynamic_mfunc… 9.0 Critical
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