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.

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Fixes

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Workaround

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History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Sun, 13 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Get-simple
Get-simple getsimplecms
Getsimple-ce
Getsimple-ce getsimple Cms
Vendors & Products Get-simple
Get-simple getsimplecms
Getsimple-ce
Getsimple-ce getsimple Cms

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title GetSimple CMS & GetSimpleCMS-CE have an Unauthenticated Admin Account Creation via Setup Logic Flaw
Weaknesses CWE-285
CWE-306
CWE-489
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-14T18:18:01.091Z

Reserved: 2026-06-11T15:50:01.281Z

Link: CVE-2026-53952

cve-icon Vulnrichment

Updated: 2026-09-14T17:11:07.019Z

cve-icon NVD

Status : Received

Published: 2026-09-11T20:17:14.060

Modified: 2026-09-14T19:17:26.103

Link: CVE-2026-53952

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-13T19:15:14Z

Weaknesses