CVE-2026-86596 json
s2Member <= 260927 - Unauthenticated Remote Code Execution via 'item_name' IPN Parameter
published 2026-11-02 6 d ago modified 2026-11-08 7 h ago also EUVD-2026-115642
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 74%
- public exploits
- 0
- none known
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 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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 8 h ago
Exploit prediction
1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- clavaque s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions
Classification
- Weakness
-
- CWE-94 Improper Control of Generation of Code
References
- wordfence.com /threat-intel/vulnerabilities/id/bbe64cd3-c5ca-4867-90de-4784510a1126?source=cve
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/utilities.inc.php#L49
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L138
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L131
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L104
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/utils-strings.inc.php#L201
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in.inc.php#L49
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-subscr-or-wa-w-level.inc.php#L514
- plugins.trac.wordpress.org /changeset/3722434/s2member
Sources
- CVE List CVE-2026-86596
- NVD CVE-2026-86596
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.