{"id":"CVE-2023-27350","aliases":["EUVD-2023-31126","GHSA-cfg6-7x4x-p3pj"],"status":"published","title":"This vulnerability allows remote attackers to bypass authentication on affected installations of...","description":"This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.","severity":{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.99999,"percentile":0.99994,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":true,"fix_available":false},"cwes":["CWE-284"],"published":"2023-04-20T00:00:00Z","modified":"2026-06-17T05:44:50Z","kev":{"date_added":"2023-04-21","due_date":"2023-05-12","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2023-04-21"},{"source":"kev","since":"2023-04-21"}],"exploits":[{"source":"metasploit","id":"exploit/multi/http/papercut_ng_auth_bypass","title":"PaperCut PaperCutNG Authentication Bypass","type":"exploit","platform":"Java","date":"2023-03-13","verified":true,"url":"https://www.rapid7.com/db/modules/exploit/multi/http/papercut_ng_auth_bypass"},{"source":"pocgithub","id":"MaanVader/CVE-2023-27350-POC","title":"MaanVader/CVE-2023-27350-POC","date":"2023-04-21","url":"https://github.com/MaanVader/CVE-2023-27350-POC"},{"source":"pocgithub","id":"imancybersecurity/CVE-2023-27350-POC","title":"imancybersecurity/CVE-2023-27350-POC","date":"2023-04-21","url":"https://github.com/imancybersecurity/CVE-2023-27350-POC"},{"source":"pocgithub","id":"horizon3ai/CVE-2023-27350","title":"horizon3ai/CVE-2023-27350","date":"2023-04-22","url":"https://github.com/horizon3ai/CVE-2023-27350"},{"source":"exploitdb","id":"EDB-51391","title":"PaperCut NG/MG 22.0.4 - Authentication Bypass","type":"webapps","platform":"multiple","date":"2023-04-25","url":"https://www.exploit-db.com/exploits/51391"},{"source":"pocgithub","id":"adhikara13/CVE-2023-27350","title":"adhikara13/CVE-2023-27350","date":"2023-04-25","url":"https://github.com/adhikara13/CVE-2023-27350"},{"source":"exploitdb","id":"EDB-51452","title":"PaperCut NG/MG 22.0.4 - Remote Code Execution (RCE)","type":"webapps","platform":"multiple","date":"2023-05-23","url":"https://www.exploit-db.com/exploits/51452"},{"source":"pocgithub","id":"Ap0dexMe0/CVE-2023-27350","title":"Ap0dexMe0/CVE-2023-27350","date":"2023-05-27","url":"https://github.com/Ap0dexMe0/CVE-2023-27350"},{"source":"pocgithub","id":"Jenderal92/CVE-2023-27350","title":"Jenderal92/CVE-2023-27350","date":"2023-06-13","url":"https://github.com/Jenderal92/CVE-2023-27350"},{"source":"pocgithub","id":"ASG-CASTLE/CVE-2023-27350","title":"ASG-CASTLE/CVE-2023-27350","date":"2024-04-19","url":"https://github.com/ASG-CASTLE/CVE-2023-27350"},{"source":"pocgithub","id":"rasan2001/CVE-2023-27350-Ongoing-Exploitation-of-PaperCut-Remote-Code-Execution-Vulnerability","title":"rasan2001/CVE-2023-27350-Ongoing-Exploitation-of-PaperCut-Remote-Code-Execution-Vulnerability","date":"2024-05-10","url":"https://github.com/rasan2001/CVE-2023-27350-Ongoing-Exploitation-of-PaperCut-Remote-Code-Execution-Vulnerability"},{"source":"pocgithub","id":"monke443/CVE-2023-27350","title":"monke443/CVE-2023-27350","date":"2025-03-09","url":"https://github.com/monke443/CVE-2023-27350"},{"source":"pocgithub","id":"0xB0y426/CVE-2023-27350-PoC","title":"0xB0y426/CVE-2023-27350-PoC","date":"2025-04-14","url":"https://github.com/0xB0y426/CVE-2023-27350-PoC"},{"source":"pocgithub","id":"Royall-Researchers/CVE-2023-27350","title":"Royall-Researchers/CVE-2023-27350","date":"2025-07-05","url":"https://github.com/Royall-Researchers/CVE-2023-27350"},{"source":"pocgithub","id":"dezso-dfield/CVE-2023-27350","title":"dezso-dfield/CVE-2023-27350","date":"2025-12-19","url":"https://github.com/dezso-dfield/CVE-2023-27350"},{"source":"pocgithub","id":"joaoaugustom/PaperCut-Authentication_Bypass_and_RCE","title":"joaoaugustom/PaperCut-Authentication_Bypass_and_RCE","date":"2026-05-30","url":"https://github.com/joaoaugustom/PaperCut-Authentication_Bypass_and_RCE"},{"source":"pocgithub","id":"HORKimhab/CVE-2023-27350-CVE-2023-27351","title":"HORKimhab/CVE-2023-27350-CVE-2023-27351","date":"2026-08-28","url":"https://github.com/HORKimhab/CVE-2023-27350-CVE-2023-27351"},{"source":"nuclei","id":"CVE-2023-27350","title":"PaperCut - Unauthenticated Remote Code Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-27350.yaml"}],"products":[{"vendor":"papercut","product":"mf/ng"},{"vendor":"papercut","product":"ng"},{"vendor":"papercut","product":"papercut_mf"},{"vendor":"papercut","product":"papercut_ng"}],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-23-233/","tags":["x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://www.papercut.com/kb/Main/PO-1216-and-PO-1219","tags":["x_transferred","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html","tags":["x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html","tags":["x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/","tags":["x_transferred","Third Party Advisory"]},{"url":"http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html","tags":["x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html","tags":["x_transferred","Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27350"},{"url":"https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-23-233"},{"url":"https://github.com/advisories/GHSA-cfg6-7x4x-p3pj"}],"sources":{"cve":[{"id":"CVE-2023-27350","description":"This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.","status":"published","published":"2023-04-20T00:00:00Z","modified":"2025-10-21T23:05:48.7Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:35:26.261013Z"}],"euvd":[{"id":"EUVD-2023-31126","description":"This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.","status":"published","published":"2023-04-20T00:00:00Z","modified":"2025-10-21T23:05:48Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"exploited_since":"2023-04-21","updated_at":"2026-11-02T20:31:27.312976Z"}],"ghsa":[{"id":"GHSA-cfg6-7x4x-p3pj","title":"This vulnerability allows remote attackers to bypass authentication on affected installations of...","description":"This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.","status":"published","published":"2023-04-20T18:30:50Z","modified":"2025-10-22T00:32:44Z","cvss":[{"version":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:04:06.493434Z"}],"kev":[{"id":"CVE-2023-27350","title":"PaperCut MF/NG Improper Access Control Vulnerability","description":"PaperCut MF/NG contains an improper access control vulnerability within the SetupCompleted class that allows authentication bypass and code execution in the context of system.","cwes":["CWE-284"],"kev":{"date_added":"2023-04-21","due_date":"2023-05-12","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2023-27350","description":"This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SetupCompleted class. The issue results from improper access control. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-18987.","status":"published","published":"2023-04-20T16:15:07.653Z","modified":"2026-06-17T05:44:50.95Z","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":"3.0","score":9.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:07:56.683259Z"}]}}