CVE-2026-53952 — GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
GetSimpleCMS-CE / GetSimpleCMS-CE	affected <= 3.3.22
GetSimpleCMS / GetSimpleCMS	affected <= 3.4.0a

CWE

CWE-285, CWE-306, CWE-489

References

https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-rw2c-w4mg-46g4

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.