Uptime Kuma is an open source, self-hosted monitoring tool. From 2.0.0 to 2.1.3 , the GET /api/badge/:id/ping/:duration? endpoint in server/routers/api-router.js does not verify that the requested monitor belongs to a public group. All other badge endpoints check AND public = 1 in their SQL query before returning data.
The ping endpoint skips this check entirely, allowing unauthenticated users to extract average ping/response time data for private monitors. This vulnerability is fixed in 2.2.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No 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 5
https://github.com/louislam/uptime-kuma/commit/303a609c05d0b174a5045c90f53c2b55…
security-advisories@github.com
https://github.com/louislam/uptime-kuma/issues/7038
security-advisories@github.com
https://github.com/louislam/uptime-kuma/issues/7135
security-advisories@github.com
https://github.com/louislam/uptime-kuma/releases/tag/2.2.0
security-advisories@github.com
https://github.com/louislam/uptime-kuma/security/advisories/GHSA-c7hf-c5p5-5g6h
security-advisories@github.com