Remote Code Execution Vulnerability in s2Member Plugin for WordPress
CVE-2026-86596

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
S2member – Excellent For All Kinds Of Memberships, Content Restriction Paywalls & Member Access Subscriptions
Vendor
CVE Published:
2 November 2026

What is CVE-2026-86596?

The s2Member plugin for WordPress contains a vulnerability that allows for Remote Code Execution through the 'item_name' parameter. This vulnerability arises from inadequate sanitization in the strip_php_tags_deep() function, which improperly strips only the literal '<?' sequences. An attacker can exploit this flaw by embedding malicious PHP code within email templates, which the system may inadvertently reassemble into executable code. Authenticated users with custom-level access and above can leverage this vulnerability to execute arbitrary code on the server, posing a significant security risk.

Affected Version(s)

s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions 0 <= 260927

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/s2member/tags/...
https://plugins.trac.wordpress.org/browser/s2member/tags/...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

khanhnv
.