CVE-2023-40577

Description

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.

How to fix CVE-2023-40577

To remediate CVE-2023-40577, upgrade the affected package to a fixed version below.

• —upgrade to 0.25.1 or later
• —no fix listed
• —upgrade to 0.15.3+ds-3+deb10u1 or later
• —upgrade to 0.25.1 or later
• —upgrade to 0.25.1 or later

Is CVE-2023-40577 being exploited?

Low — EPSS is 3.6%, meaning exploitation activity has not been observed at scale.

Affected packages (5)

• >= 0.25.0, < 0.25.1
• from 0
• from 0, < 0.15.3+ds-3+deb10u1
• from 0, < 0.25.1
• from 0, < 0.25.1

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-40577
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2023-40577
• PATCHgithub.com/prometheus/alertmanager
• WEBgithub.com/prometheus/alertmanager/security/advisories/GHSA-v86x-5fm3-5p7j