CVE-2026-27397 WordPress Really Simple Security Pro plugin <= 9.5.4.0 - Insecure Direct Object References (IDOR) vulnerability
Attackers can bypass authorization controls to access or modify unauthorized data in the Really Simple Security Pro plugin.
- 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-2026-27397?
CVE-2026-27397 is a medium-severity missing authorization vulnerability in Really Simple Security Pro, published on 19 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Authorization Bypass Through User-Controlled Key vulnerability in Really Simple Plugins B.V. Really Simple Security Pro allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Really Simple Security Pro: from n/a through 9.5.4.0.
Weakness: CWE-639
Which versions are affected by CVE-2026-27397?
How do I fix CVE-2026-27397?
No fix has been published for CVE-2026-27397 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-2026-27397 being exploited?
There is no known exploitation of CVE-2026-27397 in the wild and no public exploit code.
Sources
Also known as GHSA-6q79-hwrv-jc95.