Description
Papermerge Core through 3.5.3 contains a missing authorization vulnerability in the shared nodes API that allows authenticated users to share other users' documents by supplying arbitrary node UUIDs. Attackers can call POST /shared-nodes or PATCH /shared-nodes/access/{node_id} to grant themselves any role, then read, modify, or delete victims' documents and revoke existing shares.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| papermerge | papermerge-core | ≤ 3.5.3 | — |
References
- https://github.com/papermerge/papermerge-core/issues/1290 issue-tracking
- https://github.com/papermerge/papermerge-core/issues/1291 issue-tracking
- https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/shared_nodes/router.py#L78-L150 technical-description
- https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269 patch
- VulnCheck Advisory: Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API third-party-advisory