Description
Nexent through 2.7.0 contains a missing authorization vulnerability in check_file_access that allows authenticated users to read other tenants' knowledge-base files by skipping tenant comparison for knowledge_base/ reads. Attackers in multi-tenant deployments can list objects via GET /file/storage for presigned URLs or use GET /file/download/{object_name} to download other tenants' source documents.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
ModelEngine-Group nexent
Default version status: unaffected
0 to ≤ 2.7.0affected
pkg:github/ModelEngine-Group/nexentReferences
- https://hackmd.io/@hieuPenguinnn/nexent-knowledge-base-cross-tenant-file-read ↗
- https://github.com/ModelEngine-Group/nexent/blob/90bf1a5dbb1eb16bb4a28c2407ed4b6eda9a09bf/backend/services/file_management_service.py#L177 ↗
- https://github.com/ModelEngine-Group/nexent ↗
- https://www.vulncheck.com/advisories/nexent-through-2.7.0-cross-tenant-knowledge-base-file-read-via-check-file-access ↗