CVE-2026-86596

s2Member <= 260927 - Unauthenticated Remote Code Execution via 'item_name' IPN Parameter

CRITICAL 9.8

CVSS 3.1Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HPublished: 2026-11-02 21:30 UTCUpdated: 2026-11-02 21:30 UTCAssigner: Wordfence

Description

The s2Member plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, <= 260927 via the 'item_name' parameter parameter. This is due to insufficient sanitization in strip_php_tags_deep(), which only strips literal '<?' sequences, combined with a post-interpolation placeholder cleanup that reassembles a valid '<?php' opener after the attacker-controlled value has already been embedded in the email template. This makes it possible for authenticated attackers, with custom-level access and above, to execute code on the server.

CWE

CWE-94

Affected

clavaque s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions

View on CVE.org