CVE-2025-4587 A/B Testing for WordPress <= 1.18.2 - Authenticated (Contributor+) Stored Cross-Site Scripting
Authenticated contributors can inject arbitrary scripts via the A/B Testing plugin block, leading to stored XSS execution on victim pages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-4587?
CVE-2025-4587 is a medium-severity cross-site scripting vulnerability in johnjamesjacoby A/B Testing for WordPress, published on 27 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-4587?
How do I fix CVE-2025-4587?
No fix has been published for CVE-2025-4587 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-4587 being exploited?
There is no known exploitation of CVE-2025-4587 in the wild and no public exploit code.
Sources
Also known as GHSA-mjxw-8gwp-4j3h.