Vulnerability · Published Feb 24, 2026 · Assigned by VulnCheck
CVE-2026-26351GetSimpleCMS-CE < 3.3.22 Stored XSS via components.php
Medium 4.8
In plain English
A medium-severity cross-site scripting in GetSimpleCMS-CE from GetSimpleCMS-CE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).
Official description
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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GetSimpleCMS-CE | GetSimpleCMS-CE | 3.3.16 |
Weakness: CWE-79 · Vector: 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
References
- https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-95f7-vm92-8gpx vendor-advisory
- https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/releases/tag/v3.3.22 release-notes, patch
- https://getsimple-ce.ovh/ product
- https://www.vulncheck.com/advisories/getsimplecms-ce-stored-xss-via-components-php third-party-advisory