clavaque s2Member Plugin up to 260927 on WordPress Email Template strip_php_tags_deep item_name code injection

Summaryinfo

A vulnerability was found in clavaque s2Member Plugin up to 260927. It has been declared as problematic. This impacts the function strip_php_tags_deep of the component Email Template. Such manipulation of the argument item_name leads to code injection. This vulnerability is uniquely identified as CVE-2026-86596. The attack can be launched remotely. No exploit exists. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in clavaque s2Member Plugin up to 260927 and classified as problematic. Affected by this issue is the function strip_php_tags_deep of the component Email Template. The manipulation of the argument item_name with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-86596 since 09/08/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Applying the patch 260927 is able to eliminate this problem.

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Productinfo

Type

• WordPress Plugin

Vendor

• clavaque

Name

• s2Member Plugin

Version

• 260927

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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