XSS in Prometheus Alertmanager
CVE-2023-40577
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (48.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Prometheus Alertmanager — versions <= 0.25.0, 0.25.0
- Debian Linux — versions 10.0
Weakness classification (CWE)
References
- github.com/prometheus/alertmanager/security/advisories/GHSA-v86x-5fm3-5p7j (Vendor Advisory)
- lists.debian.org/debian-lts-announce/2023/10/msg00011.html (Mailing List)
Frequently asked questions
- What is CVE-2023-40577?
- CVE-2023-40577 is a high-severity vulnerability in Prometheus Alertmanager, classified under Cross-site Scripting. CVSS score: 7.5/10. Published 2023-08-25.
- How severe is CVE-2023-40577?
- High severity. CVSS v3 base score is 7.5 out of 10.