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Medium · 6.1 CVE-2021-47732 EUVD-2025-204837GHSA-48vh-4wjm-4mch

CMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input

Published Dec 23, 2025 · Updated Apr 7, 2026 · Assigned by VulnCheck

Description

CMSimple 5.2 contains a stored cross-site scripting vulnerability in the Filebrowser External input field that allows attackers to inject malicious JavaScript. Attackers can place unfiltered JavaScript code that executes when users click on Page or Files tabs, enabling persistent script injection.

Affected products

VendorProductAffectedFixed
CMSimple CMSimple CMSimple 5.2 —

References