CVE-2026-40742 WordPress Nelio AB Testing plugin <= 8.2.8 - Sensitive Data Exposure vulnerability
Attackers can access sensitive data due to missing authorization checks in the Nelio AB Testing plugin for WordPress.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40742?
CVE-2026-40742 is a medium-severity missing authorization vulnerability in Nelio AB Testing, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Missing Authorization vulnerability in Nelio Software Nelio AB Testing nelio-ab-testing allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Nelio AB Testing: from n/a through <= 8.2.8.
Weakness: CWE-862
Which versions are affected by CVE-2026-40742?
How do I fix CVE-2026-40742?
No fix has been published for CVE-2026-40742 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-40742 being exploited?
There is no known exploitation of CVE-2026-40742 in the wild and no public exploit code.
Sources
Also known as GHSA-h93w-324f-xffx.