CVE-2021-20323

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{"affected": [{"affectedData": [{"product": "keycloak-services", "vendor": "n/a", "versions": [{"status": "affected", "version": "keycloak 17.0.0"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*", "matchCriteriaId": "B9FD11E1-5F25-41DF-9ADA-6FBABCC8BC5D", "versionEndExcluding": "17.0.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak."}, {"lang": "es", "value": "Se ha identificado una vulnerabilidad de tipo Cross Site Scripting reflejado basada en POST en Keycloak"}], "id": "CVE-2021-20323", "lastModified": "2026-06-17T03:33:40.447", "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": "2022-03-25T19:15:08.560", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2013577"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2013577"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Quentin TEXIER (Pentester at Opencyber) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2022:0407", "cpe": "cpe:/a:redhat:red_hat_single_sign_on:7", "product_name": "RHSSO 7.5.1", "release_date": "2022-02-02T00:00:00Z"}], "bugzilla": {"description": "keycloak-services: POST based reflected Cross Site Scripting vulnerability", "id": "2013577", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2013577"}, "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": ["A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak.", "A flaw has been found in Keycloak. The clients-registrations endpoint allows execution of javascript code on the client-side, which makes it vulnerable to a Cross-Site Scripting attack."], "name": "CVE-2021-20323", "public_date": "2021-10-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-20323\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-20323\nhttps://github.com/keycloak/keycloak/security/advisories/GHSA-m98g-63qj-fp8j"], "threat_severity": "Moderate"}

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