CVE-2025-66121 WordPress SiteGround Security plugin <= 1.5.8 - Broken Access Control vulnerability
Attackers can bypass access controls in the SiteGround Security plugin for WordPress, potentially accessing restricted functionality.
- 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-2025-66121?
CVE-2025-66121 is a medium-severity missing authorization vulnerability in SiteGround Security, published on 16 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Missing Authorization vulnerability in SiteGround SiteGround Security sg-security allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects SiteGround Security: from n/a through <= 1.5.8.
Weakness: CWE-862
Which versions are affected by CVE-2025-66121?
How do I fix CVE-2025-66121?
No fix has been published for CVE-2025-66121 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-2025-66121 being exploited?
There is no known exploitation of CVE-2025-66121 in the wild and no public exploit code.
Sources
Also known as GHSA-j9wm-m2fc-3vmp.