---
id: CVE-2026-56662
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. Prior to version 1.5, the UpdateCE update
  form contained no anti-CSRF token, and the POST handler performed no token or
  reques…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'
cwe:
  - CWE-352
vendor: GetSimpleCMS-CE
product: GetSimpleCMS-CE
affected:
  - GetSimpleCMS-CE < 1.5
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T20:23:46.493'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56662'
references:
  - url: >-
      https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-2rxv-4g4m-573w
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T19:58:57.566Z'
---

## Overview

GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. Prior to version 1.5, the UpdateCE update form contained no anti-CSRF token, and the POST handler performed no token or request-origin verification. A remote attacker can host a page that auto-submits a forged POST to the update endpoint; when an authenticated administrator visits it, the server performs an attacker-directed download-and-deploy operation in the administrator's session — with no further interaction. Because the deployed content is executed (see the related ZIP-extraction advisory), this yields remote code execution. The url field is additionally written into the form unescaped, providing a secondary HTML-injection sink via a malicious upgrade.json. This issue has been patched in version 1.5.

## Remediation

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