CVE-2023-27350
PaperCut MF/NG Improper Access Control Vulnerability
IN CISA KEV
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.
- Vendor
- PaperCut
- Product
- MF/NG
- CVSS 3.1
- 9.8 (critical), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.0
- 9.8 (critical), scored by zdi-disclosures@trendmicro.comCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-284
- Published
- 2023-04-20
- NVD modified
- 2026-06-17
- NVD status
- Analyzed
CISA KEV
- Date added
- 2023-04-21
- Due date
- 2023-05-12
- Ransomware use
- Known
- Required action
- Apply updates per vendor instructions.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- packetstormsecurity.com (Third Party Advisory, VDB Entry)
- news.sophos.com (Third Party Advisory)
- www.papercut.com (Vendor Advisory)
- www.zerodayinitiative.com (Third Party Advisory, VDB Entry)
- packetstormsecurity.com (Third Party Advisory, VDB Entry)
- news.sophos.com (Third Party Advisory)
- www.papercut.com (Vendor Advisory)
- www.zerodayinitiative.com (Third Party Advisory, VDB Entry)
- www.cisa.gov (US Government Resource)
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.