CSZ CMS 1.2.7 Persistent Cross-Site Scripting via Private Messaging

Advisories

severity: medium
date: December 23, 2025
Affecting: CSZ CMS 1.2.7
CVE: CVE-2021-47738
CWE: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS: 5.1
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
References: ExploitDB-48354
Official CSZ CMS Vendor Homepage
CSZ CMS SourceForge Project
Credit: Metin Yunus Kandemir
Description: CSZ CMS 1.2.7 contains a persistent cross-site scripting vulnerability that allows unauthorized users to embed malicious JavaScript in private messages. Attackers can send messages with script payloads in the user-agent header, which will execute when an admin views the message in the backend dashboard.