CVE-2026-86596
9.8, criticalClavaque s2Member - Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions Code Injection…
- CVSS
- 9.8, critical critical CVSS v3.1
- EPSS, next 30 days
- n/a
- Exploitation
- No public evidence
- Published
- 2 Nov 2026yesterday
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.
Details
- Vendor
- Clavaque
- Product
- s2Member - Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions
- Weakness
- CWE-94 (opens in a new tab)
- Status
- Deferred
- Updated
- 2 Nov 2026
- Assigner
- security@wordfence.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References 9
Other references 9
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-subscr-or-wa-w-level.inc.php#L514 (opens in a new tab)
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L104 (opens in a new tab)
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L131 (opens in a new tab)
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in-web-accept-sp.inc.php#L138 (opens in a new tab)
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/paypal-notify-in.inc.php#L49 (opens in a new tab)
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/utilities.inc.php#L49 (opens in a new tab)
- plugins.trac.wordpress.org /browser/s2member/tags/260829/src/includes/classes/utils-strings.inc.php#L201 (opens in a new tab)
- plugins.trac.wordpress.org /changeset/3722434/s2member (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2026-86596 in your network?
This page tells you how dangerous CVE-2026-86596 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
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EXYS7600 OCELOT
Find it before attackers do
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EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
Learn more about EXYS7950 KONDRA
Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 3 Nov 2026, not the live upstream state.