Docmost is open-source collaborative wiki and documentation software. Prior to 0.90.1, an authenticated workspace member who does not belong to a private space can call the transclusion / sync-block lookup API with a known sourcePageId and transclusionId pair because the lookup does not enforce private space membership before resolving the source page. The API can return confidential sync-block content and source page metadata even though the normal page APIs deny access to the same page.
This issue is fixed in version 0.90.1.
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/830b5b4d458a1302f42c8b68bff9ff559f6eb…
security-advisories@github.com
https://github.com/docmost/docmost/releases/tag/v0.90.1
security-advisories@github.com
https://github.com/docmost/docmost/security/advisories/GHSA-5vhf-cgf2-c9cq
security-advisories@github.com