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Medium · 5.4 CVE-2021-47955 EUVD-2021-34823GHSA-7q3g-gccm-822q

CouchCMS 2.2.1 Cross-Site Scripting via SVG File Upload

Published May 16, 2026 · Updated May 24, 2026 · Assigned by VulnCheck

Description

CouchCMS 2.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to execute arbitrary JavaScript by uploading malicious SVG files through the file upload functionality. Attackers can upload SVG files containing embedded script tags to the browse.php endpoint, which are then executed in users' browsers when the files are accessed or previewed.

Affected products

VendorProductAffectedFixed
CouchCMS CouchCMS 2.2.1 —

References