{"id":"CVE-2026-21582","aliases":["EUVD-2026-62206","GHSA-vxxr-hxj5-58vp"],"status":"published","title":"This High severity BASM (Broken Authentication \u0026 Session Management) vulnerability known as CVE...","description":"This High severity BASM (Broken Authentication \u0026 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 \u0026 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.","severity":{"version":"4.0","score":8.8,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00462,"percentile":0.40532,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2026-08-18T22:00:00Z","modified":"2026-10-22T17:09:59Z","products":[{"vendor":"atlassian","product":"crowd data center"}],"references":[{"url":"https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999768"},{"url":"https://jira.atlassian.com/browse/CWD-6562"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21582"},{"url":"https://github.com/advisories/GHSA-vxxr-hxj5-58vp"}],"sources":{"cve":[{"id":"CVE-2026-21582","description":"This High severity BASM (Broken Authentication \u0026 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 \u0026 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.","status":"published","published":"2026-08-18T22:00:00.412Z","modified":"2026-08-20T18:34:02.178Z","cvss":[{"version":"4.0","score":8.8,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-62206","description":"This High severity BASM (Broken Authentication \u0026 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 \u0026 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.","status":"published","published":"2026-08-18T22:00:00Z","modified":"2026-08-20T18:34:02Z","cvss":[{"version":"4.0","score":8.8,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:01:38.846525Z"}],"ghsa":[{"id":"GHSA-vxxr-hxj5-58vp","title":"This High severity BASM (Broken Authentication \u0026 Session Management) vulnerability known as CVE...","description":"This High severity BASM (Broken Authentication \u0026 Session Management) vulnerability known as CVE-2026-21582 was introduced in version 7.2.1 of Crowd Data Center.\n\nThis BASM (Broken Authentication \u0026 Session Management) vulnerability, with a CVSS Score of 8.8, allows an unauthenticated attacker to perform actions as another user.\n\t\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:\n\t\t\n\t\tCrowd Data Center 7.2: Upgrade to a release greater than or equal to 7.2.2\n\t\t\n\t\t\n\t\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). \n\t\n\tThis vulnerability was reported via our Penetration Testing program.","status":"published","published":"2026-08-19T00:31:10Z","modified":"2026-08-20T21:32:28Z","cvss":[{"version":"4.0","score":8.8,"vector":"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","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:10:48.274578Z"}],"nvd":[{"id":"CVE-2026-21582","description":"This High severity BASM (Broken Authentication \u0026 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 \u0026 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.","status":"published","published":"2026-08-18T22:16:50.34Z","modified":"2026-10-22T17:09:59.477Z","cvss":[{"version":"4.0","score":8.8,"vector":"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","level":"high","assessor":"secondary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:12:39.620837Z"}]}}