---
id: CVE-2026-53952
title: >-
  GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is
  the community edition of that CMS
summary: >-
  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 …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-285
  - CWE-306
  - CWE-489
vendor: GetSimpleCMS-CE
product: GetSimpleCMS-CE
affected:
  - GetSimpleCMS-CE <= 3.3.22
  - GetSimpleCMS <= 3.4.0a
published: '2026-09-11'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T19:17:26.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53952'
references:
  - url: >-
      https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-rw2c-w4mg-46g4
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00553
epssPercentile: 0.4386
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-14T17:11:06.020188Z'
ingestedAt: '2026-09-14T00:35:28.533Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.