JeecgBoot Missing Authorization in SysPositionController

Executive Summary

CVE-2026-108882 is a missing authorization vulnerability in JeecgBoot through version 3.9.5. It affects the SysPositionController removeUserPosition handler, allowing any authenticated user to remove position members by sending DELETE requests with arbitrary userIds and positionId values. The system lacks proper authorization checks, enabling low-privileged attackers to delete sys_user_position rows and detach users from positions without logging.

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Detection Guidance

To detect this vulnerability, check for unauthorized DELETE requests to the endpoint /sys/position/removePositionUser with arbitrary userIds and positionId values. Monitor logs for successful deletions without proper authorization checks. Use tools like curl to test the endpoint: curl -X DELETE 'http://target.com/sys/position/removePositionUser?userIds=1&positionId=1' -H 'Authorization: Bearer <token>'

Verify if the endpoint returns a success message even when no rows are deleted. Check if low-privileged users can remove other users from positions without logging.

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Impact Analysis

This vulnerability allows unauthorized users to remove other users from positions, potentially disrupting organizational structures or access controls. Attackers could manipulate user assignments without detection, leading to unauthorized privilege changes or data access. The lack of logging means such actions may go unnoticed.

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Compliance Impact

This vulnerability could potentially impact compliance with GDPR and HIPAA by allowing unauthorized data modification. GDPR requires strict access controls and logging for personal data changes, while HIPAA mandates audit controls for protected health information. The lack of authorization checks and logging in this flaw could lead to unauthorized user role changes, violating these requirements.

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Mitigation Strategies

Immediately update JeecgBoot to a version beyond 3.9.5 where this vulnerability is patched. If an update is not possible, restrict access to the /sys/position/removePositionUser endpoint by implementing proper authorization checks and logging all deletion attempts.

Apply input validation to ensure userIds and positionId values are valid and authorized. Monitor network traffic for suspicious DELETE requests to this endpoint.

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