{"id":"CVE-2021-29622","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-29622","generatedAt":"2026-10-28T00:31:10.287Z","title":"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.","description":"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.","published":"2021-05-19T20:15:07.000Z","lastModified":"2026-06-17T03:48:03.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-601"],"affected":["prometheus/prometheus"],"epss":{"score":0.1956,"percentile":0.9736,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 19.6%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://github.com/prometheus/prometheus/releases/tag/v2.26.1","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/prometheus/prometheus/releases/tag/v2.27.1","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/prometheus/prometheus/security/advisories/GHSA-vx57-7f4q-fpc7","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/prometheus/prometheus/releases/tag/v2.26.1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/prometheus/prometheus/releases/tag/v2.27.1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/prometheus/prometheus/security/advisories/GHSA-vx57-7f4q-fpc7","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-29622","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}