CVE-2025-3397 YzmCMS message.tpl cross site scripting

Medium 5.3 Published 8 Apr 2025 Updated 8 Apr 2025

Remote attackers can inject malicious scripts via the gourl argument in YzmCMS, potentially leading to code execution or account takeover.

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-2025-3397?

CVE-2025-3397 is a medium-severity cross-site scripting vulnerability in YzmCMS, published on 8 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 YzmCMS 7.1. Affected is an unknown function of the file message.tpl. The manipulation of the argument gourl leads to cross site scripting. It is possible to launch 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-2025-3397?

It affects 1 product.

Products include Yzmcms Yzmcms.

How do I fix CVE-2025-3397?

No fix has been published for CVE-2025-3397 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-2025-3397 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3397 exists.

Sources

Also known as GHSA-vh9f-239f-vjhp.