Only self-managed Grafana instances with Auth Proxy authentication and identity caching enabled (sync_ttl greater than zero) are affected. The Auth Proxy cache key concatenated the username and forwarded identity attributes without a delimiter, so distinct identities could collide on one key. An authenticated user who shapes their own attributes to collide with a higher-privileged user's, while that user's cache entry is live, is authenticated as that user, up to Administrator (authentication bypass by spoofing).
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
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 4
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Grafana Grafana
cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*
|
— |
11.0.0
|
|
Grafana Grafana
cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*
|
12.4.10
|
13.0.0
|
|
Grafana Grafana
cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*
|
13.0.8
|
13.1.0
|
|
Grafana Grafana
cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*
|
13.1.5
|
13.2.0
|