CVE-2026-21582

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{"affected": [{"affectedData": [{"product": "Crowd Data Center", "vendor": "Atlassian", "versions": [{"status": "affected", "version": "7.2.1"}, {"status": "unaffected", "version": "7.2.2 to 7.2.3"}]}], "source": "security@atlassian.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduced in version 7.2.1 of Crowd Data Center.\r\n\r\nThis BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user.\r\n\t\r\n\tAtlassian recommends that Crowd Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions:\r\n\t\t\r\n\t\tCrowd Data Center 7.2: Upgrade to a release greater than or equal to 7.2.2\r\n\t\t\r\n\t\t\r\n\t\r\n\tSee the release notes (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). You can download the latest version of Crowd Data Center from the download center (https://www.atlassian.com/software/crowd/download-archive). \r\n\t\r\n\tThis vulnerability was reported via our Penetration Testing program."}, {"lang": "es", "value": "Esta vulnerabilidad de BASM (Broken Authentication & Session Management) de alta gravedad, conocida como CVE-2026-21582, fue introducida en la versi\u00f3n 7.2.1 de Crowd Data Center.\n\nEsta vulnerabilidad de BASM (Broken Authentication & Session Management), con una puntuaci\u00f3n CVSS de 8.8, permite a un atacante no autenticado realizar acciones como otro usuario.\n\nAtlassian recomienda que los clientes de Crowd Data Center actualicen a la \u00faltima versi\u00f3n; si no puede hacerlo, actualice su instancia a una de las versiones fijas compatibles especificadas:\n\nCrowd Data Center 7.2: Actualice a una versi\u00f3n mayor o igual a 7.2.2\n\nConsulte las notas de la versi\u00f3n (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). Puede descargar la \u00faltima versi\u00f3n de Crowd Data Center desde el centro de descargas (https://www.atlassian.com/software/crowd/download-archive).\n\nEsta vulnerabilidad fue reportada a trav\u00e9s de nuestro programa de pruebas de penetraci\u00f3n."}], "id": "CVE-2026-21582", "lastModified": "2026-10-22T17:09:59.477", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@atlassian.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21582", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-20T03:56:07.440214Z", "version": "2.0.3"}}]}, "published": "2026-08-18T22:16:50.340", "references": [{"source": "security@atlassian.com", "url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768"}, {"source": "security@atlassian.com", "url": "https://jira.atlassian.com/browse/CWD-6562"}], "sourceIdentifier": "security@atlassian.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "7.2.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.2,7.2.3]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Crowd Data Center", "source": "cna", "vendor": "Atlassian"}, "product": "crowd_data_center", "vendor": "atlassian"}], "created": "2026-08-19T09:45:03.334466+00:00", "title": "Unauthenticated User Impersonation in Atlassian Crowd Data Center", "updated": "2026-08-19T13:30:04.638147+00:00", "vendors": ["atlassian", "atlassian$PRODUCT$crowd_data_center"], "weaknesses": ["CWE-287"]}