CVE-2026-86596s2member Code Injection
s2Member <= 260927 - Unauthenticated Remote Code Execution via 'item_name' IPN Parameter
Published Nov 2, 2026 · Updated Nov 2, 2026 · Also known as EUVD-2026-115642, GHSA-9wfw-qq7f-66hm, WORDFENCE-bbe64cd3-c5ca-4867-90de-4784510a1126, bbe64cd3-c5ca-4867-90de-4784510a1126
Key Facts
Patch immediately- CVE-2026-86596 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting s2member (wordpress-plugin), s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions.
- It is exploited in the wild, listed in Industry KEV feed since Nov 2, 2026. No public exploit code is known.
- Fixed versions are available, including s2member 261001.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
n/a
Exploit maturity
Exploited (KEV)
ATLAS score
57/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Nov 2, 2026
0 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Nov 2, 2026 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| s2memberwordpress-plugin | See advisory | 261001 |
| s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions | See advisory | n/a |
Patched Releases
s2member
261001
Timeline
Publicly disclosed
Nov 2, 2026
Added to Industry KEV feed
Nov 2, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code
References
- advisorywordfence.com · bbe64cd3-c5ca-4867-90de-4784510a1126
- exploitVulnCheck exploitation report
- otherplugins.trac.wordpress.org · paypal-notify-in.inc.php
- otherplugins.trac.wordpress.org · paypal-notify-in-subscr-or-wa-w-level.inc.php
- otherplugins.trac.wordpress.org · paypal-notify-in-web-accept-sp.inc.php
FAQ
Common Questions.
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.
Affected: s2member (wordpress-plugin); s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Nov 2, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including s2member 261001.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-86596 On Your Attack Surface?
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