PT-2026-29688 · Boldgrid · W3 Total Cache

Wesley · Published 2026-04-02 · Updated 2026-04-02 · CVE-2026-5032

NVD

CVSS v3.1

7.5

High

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

The W3 Total Cache plugin for WordPress is vulnerable to information exposure in all versions up to, and including, 2.9.3. This is due to the plugin bypassing its entire output buffering and processing pipeline when the request's User-Agent header contains "W3 Total Cache", which causes raw mfunc/mclude dynamic fragment HTML comments — including the W3TC DYNAMIC SECURITY security token — to be rendered in the page source. This makes it possible for unauthenticated attackers to discover the value of the W3TC DYNAMIC SECURITY constant by sending a crafted User-Agent header to any page that contains developer-placed dynamic fragment tags, granted the site has the fragment caching feature enabled.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-5032

Affected Products

W3 Total Cache

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-5032 · Security Note
• https://plugins.trac.wordpress.org/changeset/3495959/w3-total-cache · Note
• https://plugins.trac.wordpress.org/browser/w3-total-cache/tags/2.9.3/Generic_Plugin.php#L1016 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/a65eb62d-847b-4f3a-848b-1290e3118c01?source=cve · Note