CVE-2025-3999 Seeyon Zhiyuan OA Web Application System URL Parameter date.jsp cross site scripting

Medium 5.1 Published 28 Apr 2025 Updated 12 May 2025

Remote attackers can execute arbitrary scripts via the date.jsp URL parameter in Seeyon Zhiyuan OA, potentially compromising user sessions.

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

What is CVE-2025-3999?

CVE-2025-3999 is a medium-severity cross-site scripting vulnerability in Seeyon Zhiyuan OA Web Application System, published on 28 Apr 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

A vulnerability, which was classified as problematic, has been found in Seeyon Zhiyuan OA Web Application System 8.1 SP2. This issue affects some unknown processing of the file seeyon\opt\Seeyon\A8\ApacheJetspeed\webapps\seeyon\common\js\addDate\date.jsp of the component URL Parameter Handler. The manipulation leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2025-3999?

It affects 1 product.

Products include Seeyon Oa Web Application System.

How do I fix CVE-2025-3999?

No fix has been published for CVE-2025-3999 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-2025-3999 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3999 exists.

Sources

Also known as GHSA-66m2-cpmm-mc9x.