CVE-2023-27350
PaperCut NG
Published 20 Apr 2023 · updated 17 Jun 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 21 Apr 2023, with a remediation deadline of 12 May 2023 for US federal agencies. It has been used in ransomware campaigns.
Required action: Apply updates per vendor instructions.
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.
References
- packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html · Third Party Advisory, VDB Entry
- packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html · Exploit, Third Party Advisory, VDB Entry
- packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html · Exploit, Third Party Advisory, VDB Entry
- packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html · Exploit, Third Party Advisory, VDB Entry
- news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/ · Third Party Advisory
- www.papercut.com/kb/Main/PO-1216-and-PO-1219 · Vendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-23-233/ · Third Party Advisory, VDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27350 · US Government Resource