CVE-2025-3531
MEDIUMCVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Tags
Description
A vulnerability classified as problematic has been found in YouDianCMS 9.5.21. This affects an unknown part of the file /App/Tpl/Admin/Default/Log/index.html. The manipulation of the argument UserName/LogType leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Analysis
A vulnerability classified as problematic has been found in YouDianCMS 9.5.21. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical Context
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A vulnerability classified as problematic has been found in YouDianCMS 9.5.21. This affects an unknown part of the file /App/Tpl/Admin/Default/Log/index.html. The manipulation of the argument UserName/LogType leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way. Affected products include: Youdiancms.
Affected Products
Youdiancms.
Remediation
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
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External POC / Exploit Code
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