CVE-2023-40577

medium

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.

References

https://lists.debian.org/debian-lts-announce/2023/10/msg00011.html

https://github.com/prometheus/alertmanager/security/advisories/GHSA-v86x-5fm3-5p7j

https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-2358

Details

Source: Mitre, NVD

Published: 2023-08-25

Updated: 2026-06-17

Named Vulnerability: GO-2023-2020Named Vulnerability: GHSA-v86x-5fm3-5p7j

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00634