Vulnerability · Published Oct 1, 2026 · Assigned by GitHub_M
CVE-2026-71542GetSimple CMS: Stored Cross-Site Scripting (XSS) via the "title" parameter in admin/components.php
High 8.7
In plain English
A high-severity cross-site scripting in GetSimpleCMS-CE from GetSimpleCMS-CE. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Official description
GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. In versions 3.3.22 and prior, GetSimpleCMS-CE is vulnerable to stored Cross-Site Scripting (XSS) in the "Theme to Components" functionality (admin/components.php) via the title parameter. The stored title is rendered inside a double-quoted HTML attribute in the administrative interface through an output path that HTML-entity-decodes the value before printing it, without re-encoding for the attribute context. This allows persistent execution of arbitrary JavaScript in the admin panel. At time of publication, there are no publicly available patches.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GetSimpleCMS-CE | GetSimpleCMS-CE | <= 3.3.22 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N