CVE-2026-21582

{
  "id": "CVE-2026-21582",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T22:16:50.340",
  "lastModified": "2026-10-22T17:09:59.477",
  "vulnStatus": "Awaiting Analysis",
  "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 versión 7.2.1 de Crowd Data Center.\n\nEsta 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.\n\nAtlassian 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:\n\nCrowd Data Center 7.2: Actualice a una versión mayor o igual a 7.2.2\n\nConsulte 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).\n\nEsta vulnerabilidad fue reportada a través de nuestro programa de pruebas de penetración."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Atlassian",
          "product": "Crowd Data Center",
          "versions": [
            {
              "version": "7.2.1",
              "status": "affected"
            },
            {
              "version": "7.2.2 to 7.2.3",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "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",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "NONE",
          "userInteraction": "PASSIVE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-20T03:56:07.440214Z",
          "id": "CVE-2026-21582",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768",
      "source": "[email protected]"
    },
    {
      "url": "https://jira.atlassian.com/browse/CWD-6562",
      "source": "[email protected]"
    }
  ]
}