CVE-2026-53952: GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw
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 Software
Event History
Frequently Asked Questions
Which deployments are affected?
GetSimple CMS version 3.4.0a and below and GetSimpleCMS-CE version 3.3.22 and below are affected. The vulnerable setup script can remain accessible after a legitimate installation because the intended deletion control excludes itself.
What does an attacker need to exploit this issue?
An attacker needs network access to the application and does not need an existing account, privileges, or user interaction. They can use the accessible setup logic to create a new administrator account.
Are patched versions available?
No known patched versions were available at the time of publication.