CVE-2026-5032 in W3 Total Cache Plugin

Sumário (Inglês)

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.

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Responsável

Wordfence

Reservar

27/03/2026

Divulgação

02/04/2026

Estado

Confirmado

Inscrições

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidade	CWE	Exp	Con	CVE
354831	boldgrid W3 Total Cache Plugin Divulgação de Informação	200	Não definido	Não definido	CVE-2026-5032

Fontes

• MITRE
• NVD
• CVE Details