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Medium · 6.4 CVE-2021-47917 EUVD-2021-34754GHSA-pgc8-g7q5-fq5m

Simple CMS 2.1 Persistent Cross-Site Scripting via User Input Parameters

Published Feb 1, 2026 · Updated Mar 5, 2026 · Assigned by VulnCheck

Description

Simple CMS 2.1 contains a persistent cross-site scripting vulnerability in user input parameters that allows remote attackers to inject malicious script code. Attackers can exploit the newUser and editUser modules to inject persistent scripts that execute on user list preview, potentially leading to session hijacking and application manipulation.

Affected products

VendorProductAffectedFixed
Simplephpscripts Simple CMS 2.1 —

References