CVE-2026-53952 GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw
Unauthenticated attackers can create admin accounts due to a logic flaw preventing the deletion of the setup script after installation.
- 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-2026-53952?
CVE-2026-53952 is a critical authentication bypass vulnerability in GetSimpleCMS, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. A logic flaw in GetSimple CMS (v3.4.0a and below) and GetSimpleCMS-CE (v3.3.22 and below) allows unauthenticated attackers to create a new administrator account. The application features an automated security control designed to delete the sensitive `admin/setup.php` file post-installation. However, this control is neutralized by a self-exclusion bug within the deletion logic, leaving the setup script accessible for unauthorized account creation even after a legitimate installation is completed. As of time of publication, no known patched versions are available.
Which versions are affected by CVE-2026-53952?
How do I fix CVE-2026-53952?
No fix has been published for CVE-2026-53952 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-53952 being exploited?
There is no known exploitation of CVE-2026-53952 in the wild and no public exploit code.
Sources
Also known as GHSA-rw2c-w4mg-46g4.