Headline
CVE-2023-40577: Alertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint
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.
Package
No package listed
Description
Impact
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.
Patches
Users can upgrade to Alertmanager v0.2.51.
Workarounds
Users can setup a reverse proxy in front of the Alertmanager web server to forbid access to the /api/v1/alerts endpoint.
References
N/A