CVE-2021-4461
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-30

Last updated on: 2025-11-28

Assigner: VulnCheck

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.
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Meta Information
Published
2025-10-30
Last Modified
2025-11-28
Generated
2026-06-16
EPSS Evaluated
2026-06-14
NVD
CVE-2021-4461
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
seeyon zhiyuan_oa_web_application_system 7.0_sp1
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
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