Vulnerability alerts / November 2, 2026

Vulnerability in s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions — CVE-2026-86596

CriticalSeverity
CVSS 9.8

1.5%Estimated exploit probability
EPSS

8,000+ sitesInstalls

261001Fixed in

What to do now

Update s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions to 261001 or later.

Affected versions

Everything up to and including 260927

Affected: s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions (plugin, s2member)

Check: The plugin on wordpress.org / Our record for s2Member – Excellent for All Kinds of Memberships, Content Restriction Paywalls & Member Access Subscriptions

What the vulnerability is

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.

This description is reproduced verbatim from the public vulnerability record.

Sources

This page is compiled automatically from public databases. Accuracy is not guaranteed; confirm against the vendor advisory before acting.

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