CVE-2025-3999: Seeyon Oa Web Application System

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Seeyon Oa Web Application System: version 8.1 only

Published 2025-04-28. Last modified 2026-06-17.