{"id":"CVE-2023-43320","aliases":["EUVD-2023-47739","GHSA-prc6-xmpq-r4g3"],"status":"published","title":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1...","description":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01386,"percentile":0.72418,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2023-09-27T00:00:00Z","modified":"2026-10-28T02:30:48Z","products":[{"vendor":"proxmox","product":"backup_server"},{"vendor":"proxmox","product":"proxmox_mail_gateway"},{"vendor":"proxmox","product":"virtual_environment"}],"references":[{"url":"https://bugzilla.proxmox.com/show_bug.cgi?id=4579","tags":["x_transferred","Issue Tracking","Vendor Advisory","report"]},{"url":"https://bugzilla.proxmox.com/show_bug.cgi?id=4584","tags":["x_transferred","Issue Tracking","Vendor Advisory","report"]},{"url":"https://github.com/proxmox/proxmox-rs/commit/50b793db8d3421bbfe2bce060a486263f18a90cb","tags":["x_transferred","Patch","fix"]},{"url":"http://packetstormsecurity.com/files/176967/Proxmox-VE-7.4-1-TOTP-Brute-Force.html","tags":["x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-43320","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-prc6-xmpq-r4g3"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43320.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-43320","description":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.","status":"published","published":"2023-09-27T00:00:00Z","modified":"2024-11-26T20:22:30.047Z","updated_at":"2026-11-02T14:35:14.633899Z"}],"euvd":[{"id":"EUVD-2023-47739","description":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.","status":"published","published":"2023-09-27T00:00:00Z","modified":"2024-11-26T20:22:30Z","updated_at":"2026-11-03T00:04:46.096988Z"}],"ghsa":[{"id":"GHSA-prc6-xmpq-r4g3","title":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1...","description":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.","status":"published","published":"2023-09-28T00:30:21Z","modified":"2024-02-02T18:30:25Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:55:32.369456Z"}],"nvd":[{"id":"CVE-2023-43320","description":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.","status":"published","published":"2023-09-27T23:15:12.113Z","modified":"2026-06-17T06:25:25.4Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:08:31.699785Z"}],"osv":[{"id":"CVE-2023-43320","description":"An issue in Proxmox Server Solutions GmbH Proxmox VE v.5.4 thru v.8.0, Proxmox Backup Server v.1.1 thru v.3.0, and Proxmox Mail Gateway v.7.1 thru v.8.0 allows a remote authenticated attacker to escalate privileges via bypassing the two-factor authentication component.","status":"published","published":"2023-09-27T00:00:00Z","modified":"2026-10-28T02:30:48.220051241Z","updated_at":"2026-11-02T15:44:33.792101Z"}]}}