MindSkip XueZhiSi up to 3.9.0 Teacher End Interface /api/teacher/user/delete updateByIdFilter ID privileges management

Summaryinfo

A vulnerability, which was classified as problematic, has been found in MindSkip XueZhiSi up to 3.9.0. This vulnerability affects the function updateByIdFilter of the file /api/teacher/user/delete of the component Teacher End Interface. The manipulation of the argument ID leads to privileges management. This vulnerability is listed as CVE-2026-75458. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in MindSkip XueZhiSi up to 3.9.0. This issue affects the function updateByIdFilter of the file /api/teacher/user/delete of the component Teacher End Interface. The manipulation of the argument id with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is integrity, and availability. The summary by CVE is:

The teacher-end interface POST /api/teacher/user/delete/{id} in XueZhiSi Open Source Exam System <= 3.9.0 contains a vertical privilege escalatio vulnerability. This interface accepts a user ID and then executes getUserById(id), setDeleted(true), updateByIdFilter() in sequence, without any validation of whether the current user has the authority to delete the target user. An authenticated teacher user (role=2) can delete an administrator account (role=3), constituting a vertical privilege escalation where a lower-privileged user performs a high-privileged operation.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-75458 since 08/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/31/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• MindSkip

Name

• XueZhiSi

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9.0

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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