What the vulnerability does
01Description
The A/B Testing for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'ab-testing-for-wp/ab-test-block' block in all versions up to, and including, 1.18.2 due to insufficient input sanitization and output escaping on the 'id' parameter. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
The A/B Testing for WordPress plugin through version 1.18.2 contains a stored cross-site scripting (XSS) vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in the browsers of other site users, including administrators. The vulnerability affects the plugin's scope across the site, allowing attackers to steal session tokens, modify content, or perform actions as higher-privileged users.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers and steal their session tokens or perform actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated attackers can compromise administrator accounts and modify site content or settings without direct admin access.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account (e.g., subscriber or contributor role) and network access to the site.
Key dates
06Disclosure timeline
June 27, 2025
CVE published
April 8, 2026
Record updated
