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{"affected": [{"affectedData": [{"product": "Jenkins", "vendor": "Jenkins project", "versions": [{"lessThanOrEqual": "2.274", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThanOrEqual": "LTS 2.263.1", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "jenkinsci-cert@googlegroups.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*", "matchCriteriaId": "1D0A8DA2-6151-430D-9FC2-1332E25B4E3B", "versionEndIncluding": "2.263.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*", "matchCriteriaId": "9A6F1AB1-BFB3-448F-BDAC-2A3487CBFEB6", "versionEndIncluding": "2.274", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup."}, {"lang": "es", "value": "Jenkins versiones 2.274 y anteriores, LTS versiones 2.263.1 y anteriores, no implementan ninguna restricci\u00f3n para la URL que presenta una vista previa formateada del marcado pasado como un par\u00e1metro de consulta, resultando en una vulnerabilidad de tipo cross-site scripting (XSS) reflejada si el formateador de marcado configurado no proh\u00edbe elementos no seguros (JavaScript) en el marcado."}], "id": "CVE-2021-21610", "lastModified": "2026-06-17T03:35:52.140", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-01-13T16:15:14.007", "references": [{"source": "jenkinsci-cert@googlegroups.com", "tags": ["Vendor Advisory"], "url": "https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2153"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2153"}], "sourceIdentifier": "jenkinsci-cert@googlegroups.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:0637", "cpe": "cpe:/a:redhat:openshift:3.11::el7", "package": "jenkins-0:2.263.3.1612433584-1.el7", "product_name": "Red Hat OpenShift Container Platform 3.11", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "conmon-2:2.0.21-1.rhaos4.5.el7", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "jenkins-0:2.263.3.1612434332-1.el7", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "machine-config-daemon-0:4.5.0-202102050524.p0.git.2594.ff3b8c0.el8", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "openshift-0:4.5.0-202102050524.p0.git.0.9229406.el7", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "openshift-ansible-0:4.5.0-202102031005.p0.git.0.c6839a2.el7", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "openshift-clients-0:4.5.0-202102051529.p0.git.3612.61b096a.el8", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0429", "cpe": "cpe:/a:redhat:openshift:4.5::el7", "package": "runc-0:1.0.0-72.rhaos4.5.giteadfc6b.el8", "product_name": "Red Hat OpenShift Container Platform 4.5", "release_date": "2021-03-03T00:00:00Z"}, {"advisory": "RHSA-2021:0423", "cpe": "cpe:/a:redhat:openshift:4.6::el8", "package": "jenkins-0:2.263.3.1612434510-1.el8", "product_name": "Red Hat OpenShift Container Platform 4.6", "release_date": "2021-02-17T00:00:00Z"}], "bugzilla": {"description": "jenkins: Reflected XSS vulnerability in markup formatter preview", "id": "1925151", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1925151"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-79", "details": ["Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.", "A flaw was found in jenkins. A cross-site scripting (XSS) vulnerability is possible due to the lack of restrictions in URL rendering in the formatted previews of markup passed as a query parameter if the configured markup formatter does not prohibit unsafe elements in the markup. The highest threat from this vulnerability is to data confidentiality and integrity."], "name": "CVE-2021-21610", "package_state": [{"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Not affected", "package_name": "jenkins", "product_name": "Red Hat Fuse 7"}], "public_date": "2021-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-21610\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-21610"], "threat_severity": "Important"}

{}