{"id":"CVE-2025-66171","aliases":["EUVD-2025-209741","GHSA-5f56-5m8x-gjf9"],"status":"published","title":"Apache CloudStack: Any user can create a new VM from backups they should not have access to","description":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can create new VMs using backups of any other user of the environment.\n\nBackup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.0053,"percentile":0.45264,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-359"],"published":"2026-05-08T12:11:03Z","modified":"2026-11-07T10:47:30Z","products":[{"vendor":"apache","product":"cloudstack"},{"vendor":"apache software foundation","product":"apache cloudstack"}],"references":[{"url":"https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm","tags":["vendor-advisory","Mailing List","Third Party Advisory","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/05/09/2","tags":["Mailing List","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66171","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-5f56-5m8x-gjf9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/66xxx/CVE-2025-66171.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-66171","title":"Apache CloudStack: Any user can create a new VM from backups they should not have access to","description":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can create new VMs using backups of any other user of the environment.\n\nBackup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.","status":"published","published":"2026-05-08T12:11:03.883Z","modified":"2026-05-09T06:42:59.83Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-359"],"updated_at":"2026-11-02T14:32:53.157279Z"}],"euvd":[{"id":"EUVD-2025-209741","description":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can create new VMs using backups of any other user of the environment.\n\nBackup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.","status":"published","published":"2026-05-08T12:11:03Z","modified":"2026-05-09T06:42:59Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T19:05:14.089367Z"}],"ghsa":[{"id":"GHSA-5f56-5m8x-gjf9","title":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0....","description":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can create new VMs using backups of any other user of the environment.\n\nBackup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.","status":"published","published":"2026-05-08T15:31:20Z","modified":"2026-05-09T09:31:45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-359"],"updated_at":"2026-11-02T15:07:58.197878Z"}],"nvd":[{"id":"CVE-2025-66171","description":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can create new VMs using backups of any other user of the environment.\n\nBackup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.","status":"published","published":"2026-05-08T13:16:35.483Z","modified":"2026-10-07T09:10:00.16Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-359"],"updated_at":"2026-11-02T14:12:02.090779Z"}],"osv":[{"id":"CVE-2025-66171","title":"Apache CloudStack: Any user can create a new VM from backups they should not have access to","description":"The CloudStack Backup plugin has an improper access logic in versions 4.21.0.0 and 4.22.0.0. Anyone with authenticated user-account access in CloudStack 4.21.0.0+ environments, where this plugin is enabled and have access to specific APIs can create new VMs using backups of any other user of the environment.\n\nBackup plugin users using CloudStack 4.21.0.0+ are recommended to upgrade to CloudStack version 4.22.0.1, which fixes this issue.","status":"published","published":"2026-05-08T12:11:03.883Z","modified":"2026-11-07T10:47:30.050756295Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-359"],"updated_at":"2026-11-07T11:15:38.581573Z"}]}}