CVE-2026-21582

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. This BASM (Broken Authentication & Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user. Atlassian 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: Crowd Data Center 7.2: Upgrade to a release greater than or equal to 7.2.2 See 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). This vulnerability was reported via our Penetration Testing program.

CVSS

No CVSS.

References

Link	Resource
https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768
https://jira.atlassian.com/browse/CWD-6562

Configurations

No configuration.

History

22 Oct 2026, 17:09

Type	Values Removed	Values Added
Summary		(es) Esta vulnerabilidad de BASM (Broken Authentication & Session Management) de alta gravedad, conocida como CVE-2026-21582, fue introducida en la versión 7.2.1 de Crowd Data Center. Esta vulnerabilidad de BASM (Broken Authentication & Session Management), con una puntuación CVSS de 8.8, permite a un atacante no autenticado realizar acciones como otro usuario. Atlassian recomienda que los clientes de Crowd Data Center actualicen a la última versión; si no puede hacerlo, actualice su instancia a una de las versiones fijas compatibles especificadas: Crowd Data Center 7.2: Actualice a una versión mayor o igual a 7.2.2 Consulte las notas de la versión (https://confluence.atlassian.com/crowd/crowd-release-notes-199094.html). Puede descargar la última versión de Crowd Data Center desde el centro de descargas (https://www.atlassian.com/software/crowd/download-archive). Esta vulnerabilidad fue reportada a través de nuestro programa de pruebas de penetración.

Information

Published : 2026-08-18 22:16

Updated : 2026-10-22 17:09

NVD link : CVE-2026-21582

Mitre link : CVE-2026-21582

CVE.ORG link : CVE-2026-21582

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

{"id": "CVE-2026-21582", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21582", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-20T03:56:07.440214Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "security@atlassian.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.8, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security@atlassian.com", "affectedData": [{"vendor": "Atlassian", "product": "Crowd Data Center", "versions": [{"status": "affected", "version": "7.2.1"}, {"status": "unaffected", "version": "7.2.2 to 7.2.3"}]}]}], "published": "2026-08-18T22:16:50.340", "references": [{"url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768", "source": "security@atlassian.com"}, {"url": "https://jira.atlassian.com/browse/CWD-6562", "source": "security@atlassian.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-287"}]}], "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."}], "lastModified": "2026-10-22T17:09:59.477", "sourceIdentifier": "security@atlassian.com"}