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TI-2023-12085 Aliases CVE-2023-27350GHSA-cfg6-7x4x-p3pj

Improper access control in PaperCut NG

Priority CRITICAL 100Exploited in the wildCWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2023-04-21CISA due date 2023-05-12Known ransomware use
EPSS 0.99999 99th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PaperCutNG22.0.5 (Build 63914)—No fix listedCNA
  • NG VendorPaperCut Affected 22.0.5 (Build 63914) Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:*8.0 to before 20.1.7; 21.0.0 to before 21.2.11; 22.0.0 to before 22.0.9VulnerablePaperCut
cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:*8.0 to before 20.1.7; 21.0.0 to before 21.2.11; 22.0.0 to before 22.0.9VulnerablePaperCut
  • cpe:2.3:a:papercut:papercut_mf:*:*:*:*:*:*:*:* Versions 8.0 to before 20.1.7; 21.0.0 to before 21.2.11; 22.0.0 to before 22.0.9 Vulnerable ·PaperCut
  • cpe:2.3:a:papercut:papercut_ng:*:*:*:*:*:*:*:* Versions 8.0 to before 20.1.7; 21.0.0 to before 21.2.11; 22.0.0 to before 22.0.9 Vulnerable ·PaperCut

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2023-04-21 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2023-27350
  3. 2026-10-03 Alias added: GHSA-cfg6-7x4x-p3pj

References

Exploit 3

Advisory 4

  • TI-2026-56642 PaperCut MF/NG: Unsafe Dynamic Class Loading in Database Connector KEVCVSS 4.0CRITICAL 9.4
  • TI-2023-02373 PaperCut MF/NG 22.0.10 (Build 65996 2023-03-27) - Remote code execution via CSRF KEVCVSS 3.1HIGH 8.8
  • TI-2026-56284 PaperCut MF/NG: Authentication Bypass KEVCVSS 4.0HIGH 8.8
  • TI-2023-12086 Improper authentication in PaperCut NG KEVCVSS 3.1HIGH 7.5
  • TI-2023-20314 PaperCut NG and PaperCut MF before 22.1.3 on Windows allow path traversal, enabling… CVSS 3.1CRITICAL 9.8
  • TI-2024-01136 Incorrect authorization controls in PaperCut NG/MF APIs CVSS 3.1CRITICAL 9.8
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences