Nezha Dashboard versions before 2.3.5 fail to restrict service monitor task types to supported probe types, allowing authenticated users with nezha:service:write scope to submit privileged task types through the service API. Attackers can deliver command execution or Agent configuration tasks to Agents within their authorization scope by exploiting the shared protobuf Task.Type namespace between service monitors and privileged operations.
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
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
nezhahq:nezha
References 3
https://github.com/nezhahq/nezha/security/advisories/GHSA-grrw-fx36-fv32
GitHub Security Advisory (GHSA-grrw-fx36-fv32)
https://github.com/nezhahq/nezha/commit/38824dbc11a63964c5b9296ae4c68e62b34fa04b
Patch Commit
https://www.vulncheck.com/advisories/nezha-dashboard-before-2.3.5-task-type-val…
VulnCheck Advisory: Nezha Dashboard before 2.3.5 Task Type Validation Bypass