Checkmate through 3.11.0 omits the isAllowed role guard middleware on maintenance-window, notification, and check-deletion routes, allowing read-only users to perform administrative actions. Attackers with user-role sessions can create arbitrary maintenance windows to silence alerts, modify notification channels, and delete monitor check history to erase incident evidence.
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
None
No data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/bluewave-labs/Checkmate
disclosure@vulncheck.com
https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/c…
disclosure@vulncheck.com
https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/m…
disclosure@vulncheck.com
https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/n…
disclosure@vulncheck.com
https://github.com/bluewave-labs/Checkmate/issues/3916
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/checkmate-through-3.11.0-missing-authoriza…
disclosure@vulncheck.com