CVE Watch5 sept 2026

CVE-2026-52766

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the {{erasespamedcomments}} wiki action (actions/EraseSpamedCommentsAction.

CVSS

9.1

Crítico

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 5 sept 2026 · Última mod.: 5 sept 2026 · CWE-276 · CWE-862

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

YesWiki is a wiki system written in PHP. Prior to version 4.6.6, the {{erasespamedcomments}} wiki action (actions/EraseSpamedCommentsAction.php) accepts a suppr[] array from POST and deletes every wiki page whose tag appears in that array, with no authorization check anywhere in the action body or in the page-deletion path it invokes. Combined with YesWiki's allow-by-default action ACL model, any user who has page write access, which is the default for everyone (default_write_acl='*') on a fresh install can permanently delete arbitrary wiki pages, including the front page, admin pages, and pages owned by other users. This issue has been patched in version 4.6.6.

Referencias oficiales

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