{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-04T16:34:22.223","vulnerabilities":[{"cve":{"id":"CVE-2021-39191","sourceIdentifier":"security-advisories@github.com","published":"2021-09-03T14:15:07.210","lastModified":"2024-11-21T06:18:50.737","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9.4, the 3rd-party init SSO functionality of mod_auth_openidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the `target_link_uri` parameter. A patch in version 2.4.9.4 made it so that the `OIDCRedirectURLsAllowed` setting must be applied to the `target_link_uri` parameter. There are no known workarounds aside from upgrading to a patched version."},{"lang":"es","value":"mod_auth_openidc es un módulo de autenticación/autorización para el servidor HTTP Apache versión 2.x, que funciona como OpenID Connect Relying Party, autenticando a usuarios contra un proveedor de OpenID Connect. En las versiones anteriores a 2.4.9.4, la funcionalidad de SSO init de terceros de mod_auth_openidc era vulnerable a un ataque de redirección abierta mediante el suministro de una URL diseñada en el parámetro \"target_link_uri\". Un parche en la versión 2.4.9.4 hizo que la configuración \"OIDCRedirectURLsAllowed\" se aplicara al parámetro \"target_link_uri\". No se conocen soluciones aparte de la actualización a una versión parcheada"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N","baseScore":4.7,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":1.4},{"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"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-601"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*","versionEndExcluding":"2.4.9.4","matchCriteriaId":"93E4D476-0087-4EBC-82E8-6B233FCC291A"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*","matchCriteriaId":"80E516C0-98A4-4ADE-B69F-66A772E2BAAA"},{"vulnerable":true,"criteria":"cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*","matchCriteriaId":"5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","matchCriteriaId":"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}]}]}],"references":[{"url":"https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/zmartzone/mod_auth_openidc/issues/672","source":"security-advisories@github.com","tags":["Exploit"]},{"url":"https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/07/msg00020.html","source":"security-advisories@github.com","tags":["Mailing List"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/","source":"security-advisories@github.com"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/","source":"security-advisories@github.com"},{"url":"https://github.com/zmartzone/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/zmartzone/mod_auth_openidc/issues/672","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit"]},{"url":"https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9.4","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Release Notes"]},{"url":"https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-2pgf-8h6h-gqg2","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/07/msg00020.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/32RGPW5LZDLDTB7MKZIGAHPSLFOUNWR5/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RHXO4O4G2UQS7X6OQJCVZKHZAQ7SAIFB/","source":"af854a3a-2127-422b-91ae-364da2661108"}]}}]}