CVE-2023-27350
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.
Actively exploited
- In the CISA exploited-vulnerabilities catalogue since Apr 21, 2023
- US federal agencies must remediate it by May 12, 2023 (BOD 22-01)
- Attacked 3 days before the vulnerability was made public
- Confirmed by sensors, not only by reports
- Used in ransomware campaigns
Apply updates per vendor instructions.
Source: CISA KEV · Oct 21, 2026 Oct 20, 2026 Oct 19, 2026 Oct 7, 2026 Oct 4, 2026 Oct 3, 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
| Vendors | Product | Versions |
|---|---|---|
| papercut | papercut mf | < 20.1.7 |
| papercut | papercut ng | < 20.1.7 |
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