Cap v0.3.1 contains a broken access control vulnerability in the POST /api/video/comment endpoint that allows authenticated users to post comments on any private video without permission by supplying an arbitrary videoId in the request body. Attackers can inject comments into private video recordings belonging to other users, trigger comment notification emails to the video owner, and enumerate valid video IDs through response differences.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
capsoftware:cap
References 4
https://github.com/CapSoftware/Cap
disclosure@vulncheck.com
https://github.com/CapSoftware/Cap/commit/1b812d88958f784ee66d2eace60e731624832…
disclosure@vulncheck.com
https://github.com/CapSoftware/Cap/issues/1982
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/cap-broken-access-control-via-video-commen…
disclosure@vulncheck.com