{"id":"CVE-2026-86596","title":"s2Member <= 260927 - Unauthenticated Remote Code Execution via 'item_name' IPN Parameter","summary":"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 on…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-94"],"vendor":"clavaque","product":"s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions","affected":["s2member_excellent_for_all_kinds_of_memberships_content_restriction_paywalls_member_access_subscriptions <= 260927"],"exploitAvailable":true,"published":"2026-11-02","updated":"2026-11-02","sourceUpdated":"2026-11-02T21:30:23.199Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-86596","references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/bbe64cd3-c5ca-4867-90de-4784510a1126?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/utilities.inc.php#L49"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L138"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L131"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L104"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/utils-strings.inc.php#L201"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in.inc.php#L49"},{"url":"https://plugins.trac.wordpress.org/browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-subscr-or-wa-w-level.inc.php#L514"},{"url":"https://plugins.trac.wordpress.org/changeset/3722434/s2member"}],"tags":["cve.org","exploit-available"],"epss":0.01487,"epssPercentile":0.74201,"exploits":{"github":2,"githubRepos":["https://github.com/Aureels/CVE-2026-86596","https://github.com/thiscitze/cve-2026-86596-poc"],"checkedAt":"2026-11-07T18:34:43.521Z"},"ingestedAt":"2026-11-05T19:30:42.858Z","slug":"CVE-2026-86596","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `s2member_excellent_for_all_kinds_of_memberships_content_restriction_paywalls_member_access_subscriptions <= 260927`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.3,"exploitation":12,"ransomware":0},"changes":[]}