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 · Aug 26, 2026 Aug 25, 2026 Aug 22, 2026 Aug 21, 2026 Aug 19, 2026 Aug 18, 2026
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
| Vendors | Prodotto | Versioni |
|---|---|---|
| papercut | papercut mf | < 20.1.7 |
| papercut | papercut ng | < 20.1.7 |
Related articles
VulnerabilitiesZero-day in PaperCut NG and MF: Actively Exploited, All Versions at Risk
PaperCut NG/MF zero-day flaw actively exploited; all versions at risk. No CVE assigned. Emergency patches released; check for IOCs and restrict web access.
VulnerabilitiesPaperCut Under Attack: Zero-Day Exploited, Emergency Patch, and Order to Isolate Servers
PaperCut software hit by zero-day exploit; emergency patch issued. Isolate servers to prevent attacks. Details on vulnerabilities and remediation steps.
This product uses the NVD API but is not endorsed or certified by the NVD.