CVE-2023-40577CWE-79

Alertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint

High · published August 25, 2023

CVSS v3.1
7.5
EPSS
1%
Percentile
49.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00634 · 49.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2023-08-25T00:12Z
EPSS history
Timeline
  • 25 AUG 00:12Z
    Alertmanager UI is vulnerable to stored XSS via the /api/v1/alerts endpoint
    cvelistv5