{"id":"CVE-2023-27100","aliases":["EUVD-2023-30884","GHSA-wmh3-5pfq-qpp8"],"status":"published","title":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate...","description":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.09924,"percentile":0.95626,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-307"],"published":"2023-03-22T00:00:00Z","modified":"2026-06-17T05:44:22Z","exploits":[{"source":"exploitdb","id":"EDB-51352","title":"pfsenseCE v2.6.0 - Anti-brute force protection bypass","type":"remote","platform":"hardware","date":"2023-04-08","url":"https://www.exploit-db.com/exploits/51352"},{"source":"pocgithub","id":"fabdotnet/CVE-2023-27100","title":"fabdotnet/CVE-2023-27100","date":"2024-05-20","url":"https://github.com/fabdotnet/CVE-2023-27100"}],"products":[{"vendor":"netgate","product":"pfsense_plus"},{"vendor":"pfsense","product":"pfsense"}],"references":[{"url":"https://docs.netgate.com/downloads/pfSense-SA-23_05.sshguard.asc","tags":["x_transferred","Vendor Advisory"]},{"url":"https://redmine.pfsense.org/issues/13574","tags":["x_transferred","Issue Tracking","Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/171791/pfsenseCE-2.6.0-Protection-Bypass.html","tags":["x_transferred"]},{"url":"https://packetstorm.news/files/id/171791","tags":["exploit"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27100"},{"url":"https://github.com/advisories/GHSA-wmh3-5pfq-qpp8"}],"sources":{"cve":[{"id":"CVE-2023-27100","description":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","status":"published","published":"2023-03-22T00:00:00Z","modified":"2025-02-25T21:10:13.968Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:35:26.63732Z"}],"euvd":[{"id":"EUVD-2023-30884","description":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","status":"published","published":"2023-03-22T00:00:00Z","modified":"2025-02-25T21:10:13Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T20:53:23.677257Z"}],"ghsa":[{"id":"GHSA-wmh3-5pfq-qpp8","title":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate...","description":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","status":"published","published":"2023-03-23T00:30:16Z","modified":"2025-02-26T00:32:07Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T15:00:03.228993Z"}],"nvd":[{"id":"CVE-2023-27100","description":"Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.","status":"published","published":"2023-03-22T23:15:12.35Z","modified":"2026-06-17T05:44:22.42Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-307"],"updated_at":"2026-11-02T14:07:50.908252Z"}]}}