Open Redirect Affecting prometheus package, versions <2.27.1-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
19.56% (98th percentile)

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  • Snyk IDSNYK-ALPINE323-PROMETHEUS-14183117
  • published4 Dec 2025
  • disclosed19 May 2021

Introduced: 19 May 2021

CVE-2021-29622  (opens in a new tab)
CWE-601  (opens in a new tab)

How to fix?

Upgrade Alpine:3.23 prometheus to version 2.27.1-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream prometheus package and not the prometheus package as distributed by Alpine. See How to fix? for Alpine:3.23 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1