Docmost is open-source collaborative wiki and documentation software. From 0.70.0 until 0.80.1, a low-privileged authenticated user who can edit an exportable page can embed a forged attachmentId that belongs to a restricted page in the same space. Exporting the attacker-controlled page with includeAttachments=true causes the page export flow to read the restricted attachment from storage and include it in the returned ZIP archive even though direct file download denies access.
This issue is fixed in version 0.80.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://github.com/docmost/docmost/commit/a573acedd0317f3472cb0f8b95f6aa1531531…
security-advisories@github.com
https://github.com/docmost/docmost/releases/tag/v0.80.1
security-advisories@github.com
https://github.com/docmost/docmost/security/advisories/GHSA-rxm9-xp9h-4c84
security-advisories@github.com