A/B Testing for WordPress Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the A/B Testing for WordPress plugin, affecting all versions through 1.18.2. The issue arises in the 'ab-testing-for-wp/ab-test-block' block, where inadequate input sanitization and output escaping of the 'id' parameter allow authenticated attackers with contributor-level access or higher to inject arbitrary scripts. These scripts execute when a user accesses the compromised page.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.