---
id: CVE-2026-26351
title: GetSimpleCMS-CE < 3.3.22 Stored XSS via components.php
summary: >-
  GetSimpleCMS Community Edition (CE) versions prior to 3.3.22 (3.3.16 tested)
  contains a stored cross-site scripting (XSS) vulnerability in the Theme to
  Components functionality within components.php. User-supplied input provided
  to the "…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: GetSimpleCMS-CE
product: GetSimpleCMS-CE
affected:
  - GetSimpleCMS-CE 3.3.16
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-02-27T20:53:55.727110Z'
published: '2026-02-24'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:01:36.086Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-26351'
references:
  - url: >-
      https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-95f7-vm92-8gpx
    label: GitHub Security Advisory (GHSA-95f7-vm92-8gpx)
  - url: 'https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/releases/tag/v3.3.22'
    label: GetSimpleCMS-CE 3.3.22 Release Notes
  - url: 'https://getsimple-ce.ovh/'
  - url: >-
      https://www.vulncheck.com/advisories/getsimplecms-ce-stored-xss-via-components-php
tags:
  - cve.org
epss: 0.00333
epssPercentile: 0.26844
ingestedAt: '2026-11-08T14:51:22.468Z'
---

## Overview

GetSimpleCMS Community Edition (CE) versions prior to 3.3.22 (3.3.16 tested) contains a stored cross-site scripting (XSS) vulnerability in the Theme to Components functionality within components.php. User-supplied input provided to the "slug" field of a component is stored without proper output encoding. While other fields are sanitized using safe_slash_html(), the slug parameter is written to XML and later rendered in the administrative interface without sanitation, resulting in persistent execution of arbitrary JavaScript. An authenticated administrator can inject malicious script content that executes whenever the affected Components page is viewed by any authenticated user, enabling session hijacking, unauthorized administrative actions, and persistent compromise of the CMS administrative interface.

## Affected

- `GetSimpleCMS-CE 3.3.16`

## Remediation

Version 3.3.22 was confirmed to not be vulnerable