{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-04T09:49:13.318","vulnerabilities":[{"cve":{"id":"CVE-2021-21291","sourceIdentifier":"security-advisories@github.com","published":"2021-02-02T19:15:14.330","lastModified":"2024-11-21T05:47:56.980","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"OAuth2 Proxy is an open-source reverse proxy and static file server that provides authentication using Providers (Google, GitHub, and others) to validate accounts by email, domain or group. In OAuth2 Proxy before version 7.0.0, for users that use the whitelist domain feature, a domain that ended in a similar way to the intended domain could have been allowed as a redirect. For example, if a whitelist domain was configured for \".example.com\", the intention is that subdomains of example.com are allowed. Instead, \"example.com\" and \"badexample.com\" could also match. This is fixed in version 7.0.0 onwards. As a workaround, one can disable the whitelist domain feature and run separate OAuth2 Proxy instances for each subdomain."},{"lang":"es","value":"OAuth2 Proxy es un proxy inverso de código abierto y un servidor de archivos estáticos que proporciona autenticación usando Proveedores (Google, GitHub y otros) para comprobar cuentas por correo electrónico, dominio o grupo. En OAuth2 Proxy versiones anteriores a 7.0.0, para los usuarios que usan la funcionalidad whitelist domain, se podría haber permitido como redireccionamiento un dominio que terminara de manera similar al dominio deseado. Por ejemplo, si se configuró un dominio de lista blanca para \".example.com\", la intención es que se permitan los subdominios de example.com. En su lugar, \"example.com\" y \"badexample.com\" también podrían coincidir. Esto es corregido en versión 7.0.0 en adelante. Como solución alternativa, se puede deshabilitar la funcionalidad whitelist domain y ejecutar instancias de proxy OAuth2 separadas para cada subdominio"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":4.7,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":2.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:P/A:N","baseScore":5.8,"accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"NONE"},"baseSeverity":"MEDIUM","exploitabilityScore":8.6,"impactScore":4.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-601"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:oauth2_proxy_project:oauth2_proxy:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.0","matchCriteriaId":"C5387BEC-6842-4C28-8A24-ED8A37A18BCD"}]}]}],"references":[{"url":"https://github.com/oauth2-proxy/oauth2-proxy/commit/780ae4f3c99b579cb2ea9845121caebb6192f725","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.0.0","source":"security-advisories@github.com","tags":["Release Notes","Third Party Advisory"]},{"url":"https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-4mf2-f3wh-gvf2","source":"security-advisories@github.com","tags":["Exploit","Third Party Advisory"]},{"url":"https://pkg.go.dev/github.com/oauth2-proxy/oauth2-proxy/v7","source":"security-advisories@github.com","tags":["Product","Third Party Advisory"]},{"url":"https://github.com/oauth2-proxy/oauth2-proxy/commit/780ae4f3c99b579cb2ea9845121caebb6192f725","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.0.0","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes","Third Party Advisory"]},{"url":"https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-4mf2-f3wh-gvf2","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"]},{"url":"https://pkg.go.dev/github.com/oauth2-proxy/oauth2-proxy/v7","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Product","Third Party Advisory"]}]}}]}