CVE-2023-27350
PaperCut MF/NG Improper Access Control Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://www.papercut.com/kb/Main/PO-1216-and-PO-1219; https://nvd.nist.gov/vuln/detail/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.
Severity
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation Context
as of October 14, 2026- CISA added CVE-2023-27350 to the KEV catalog 1 day after its CVE record was published. The median for entries added in 2023 is 12 days.
- It is one of 5 PaperCut entries in the CISA KEV catalog, and the only one added in 2023.
- Its current EPSS score (100.0%) is higher than that of 97% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| PaperCut | PaperCut NG | 22.0.5 (Build 63914) |
References
7 Links- https://www.zerodayinitiative.com/advisories/ZDI-23-233/
- https://www.papercut.com/kb/Main/PO-1216-and-PO-1219
- http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html
- https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/
- http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html
Record Details
More from PaperCut
PaperCut MF/NG: Authentication Bypass
PaperCut NG/MF Improper Authentication Vulnerability
PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector
PaperCut MF/NG 22.0.10 (Build 65996 2023-03-27) - Remote code execution via CSRF
Related
Tool categories
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.