VULNERABILITY INTELLIGENCE
CVE-2021-4461
EPSS probability0.49%
CISA KEVNot currently listed
Published2025-10-30
Last modified2026-06-17
Description
Seeyon Zhiyuan OA Web Application System versions up to and including 7.0 SP1 improperly decode and parse the `enc` parameter in thirdpartyController.do. The decoded map values can influence session attributes without sufficient authentication/authorization checks, enabling attackers to assign a session to arbitrary user IDs. VulnCheck has observed this vulnerability being exploited in the wild as of 2025-10-30 at 00:30:40.855917 UTC.
Weakness classification
- disclosure@vulncheck.com: CWE-306