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Critical · 9.8 Public exploit CVE-2026-86596 EUVD-2026-115642GHSA-9wfw-qq7f-66hm

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

Published Nov 2, 2026 · Updated Nov 8, 2026 · Assigned by Wordfence

Vendor: clavaque Product: s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions Category: Web / CMS

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.

Affected products

VendorProductAffectedFixed
clavaque s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions ≤ 260927 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 2 repositories

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

References