CVE-2021-29622

Arbitrary redirects under /new endpoint

Prometheus is an open-source monitoring system and time series database. In 2.23.0, Prometheus changed its default UI to the New ui. To ensure a seamless transition, the URL's prefixed by /new redirect to /. Due to a bug in the code, it is possible for an attacker to craft an URL that can redirect to any other URL, in the /new endpoint. If a user visits a prometheus server with a specially crafted address, they can be redirected to an arbitrary URL. The issue was patched in the 2.26.1 and 2.27.1 releases. In 2.28.0, the /new endpoint will be removed completely. The workaround is to disable access to /new via a reverse proxy in front of Prometheus.

Affected

prometheus

CVSS v3.1 NVD

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 GITHUB

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS v2.0 NVD

5.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:N

EPSS

19.56% chance of exploitation in the next 30 days, 97th percentile

Nuclei

medium · CWE-601

Published

2021-05-19

Updated

2024-08-03

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-29622.yaml

Exploit collections (2)

• prometheus-url-redirection-cve-2021-29622.ymlchaitin/xray
• CVE-2021-29622.yamlzan8in/afrog

Security advisories

• prometheus/prometheus/releases/tag/v2.26.1
• prometheus/prometheus/security/advisories/GHSA-vx57-7f4q-fpc7
• advisories/GHSA-vx57-7f4q-fpc7

References

• CVE Record
• NVD entry