Seeyon Zhiyuan OA Web Application System < 7.0 SP1 Authentication Bypass

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.

** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: The vendor mentioned in the original disclosure filed a report that this issue affects a different vendor. The researcher was not able to provide a proof for his disputed claim which is why the CNA decided to revoke the whole entry.

** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: The vendor mentioned in the original disclosure filed a report that this issue affects a different vendor. The researcher was not able to provide a proof for his disputed claim which is why the CNA decided to revoke the whole entry.

** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: The vendor mentioned in the original disclosure filed a report that this issue affects a different vendor. The researcher was not able to provide a proof for his disputed claim which is why the CNA decided to revoke the whole entry.