Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with the permission to perform POST requests on the /api/v1/alerts endpoint could be able to execute arbitrary JavaScript code on the users of Prometheus Alertmanager. This issue has been fixed in Alertmanager version 0.2.51.
| Software | From | Fixed in |
|---|---|---|
github.com/prometheus/alertmanager
|
- | 0.25.1 |
| prometheus / alertmanager | 0.25.0 | 0.25.0.x |
| debian / debian_linux | 10.0 | 10.0.x |