s2Member vulnerabilities

The s2Member plugin for WordPress in versions up to and including 260927 is vulnerable to Remote Code Execution via the 'item_name' parameter. Insufficient sanitization in strip_php_tags_deep() only strips literal '<?' sequences, and a post-interpolation placeholder cleanup reassembles a valid '<?php' opener after the attacker-controlled value has already been embedded in the email template.

Improper Control of Generation of Code ('Code Injection') vulnerability in Cristián Lávaque s2Member s2member. This issue affects s2Member: from n/a through 250905.

The s2Member WordPress plugin before 260805 does not escape several shortcode attributes before outputting them inside an inline script context, allowing users with contributor-level access to inject arbitrary JavaScript that executes when a viewer opens the post (stored XSS).