{"id":"CVE-2021-22903","state":"PUBLISHED","title":"The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain \"allowed host\" formats can ca","description":"The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, `config.hosts << \"sub.example.com\"` to permit a request with a Host header value of `sub-example.com`.","publishedAt":"2021-06-11T15:49:38.000Z","updatedAt":"2024-08-03T18:58:25.786Z","severity":null,"assigner":"hackerone","products":["n/a https://github.com/rails/rails"],"affected":[{"vendor":"n/a","product":"https://github.com/rails/rails","versions":[{"version":"Fixed in 6.1.3.2","status":"affected"}]}],"references":["https://hackerone.com/reports/1148025","https://discuss.rubyonrails.org/t/cve-2021-22903-possible-open-redirect-vulnerability-in-action-pack/77867"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T19:48:02.192Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/22xxx/CVE-2021-22903.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-22903","state":"PUBLISHED","datePublished":"2021-06-11T15:49:38.000Z","dateUpdated":"2024-08-03T18:58:25.786Z","assignerShortName":"hackerone","assignerOrgId":"36234546-b8fa-4601-9d6f-f4e334aa8ea1","dateReserved":"2021-01-06T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. 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