CVE-2025-3531 YouDianCMS index.html cross site scripting

Medium 5.3 Published 13 Apr 2025 Updated 14 Apr 2025

Remote attackers can inject malicious scripts via UserName or LogType parameters in YouDianCMS admin logs, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-3531?

CVE-2025-3531 is a medium-severity cross-site scripting vulnerability in YouDianCMS, published on 13 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official 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.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2025-3531?

It affects 1 product.

Products include Youdiancms Youdiancms.

How do I fix CVE-2025-3531?

No fix has been published for CVE-2025-3531 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2025-3531 being exploited?

There is no known exploitation of CVE-2025-3531 in the wild and no public exploit code.

Sources

Also known as GHSA-6whm-6hpx-vjhj.