# CVE-2023-27350: PaperCut MF/NG Improper Access Control Vulnerability

Source: https://junglewise.ai/threats/cve-2023-27350-papercut-mf-ng-improper-access-control-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-04-21. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2023-27350 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2023-04-21

PaperCut MF and NG contain an improper access control vulnerability in the SetupCompleted class. Remote, unauthenticated attackers can bypass authentication to execute arbitrary code with SYSTEM privileges.

Technologies: [PaperCut Mf](https://junglewise.ai/threats/technologies/mf), [PaperCut Ng](https://junglewise.ai/threats/technologies/ng). Vendors: [PaperCut](https://junglewise.ai/threats/vendors/papercut).

## Quick answers

**Is CVE-2023-27350 exploited in the wild?** Yes. CVE-2023-27350 is known to be exploited in the wild, first recorded on 21 April 2023. Treat it as urgent.

**How severe is CVE-2023-27350?** Critical severity, with a CVSS score of 9.8, published 21 April 2023.

**Which products and versions are affected?** PaperCut PaperCut MF 8.0.0 to 20.1.6, 21.0.0 to 21.2.10, 22.0.0 to 22.0.8; PaperCut PaperCut NG 8.0.0 to 20.1.6, 21.0.0 to 21.2.10, 22.0.0 to 22.0.8.

**Is there a fix for CVE-2023-27350?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2023-27350 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2023-27350?** Check whether you run PaperCut Mf, PaperCut MF/NG or PaperCut Ng. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- PaperCut PaperCut MF 8.0.0 to 20.1.6, 21.0.0 to 21.2.10, 22.0.0 to 22.0.8
- PaperCut PaperCut NG 8.0.0 to 20.1.6, 21.0.0 to 21.2.10, 22.0.0 to 22.0.8

## Timeline

- 2023-04-21: disclosed
- 2023-04-21: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-04-21: advisory

## Related threats

- [PaperCut MF/NG authentication bypass in report generation](https://junglewise.ai/threats/cve-2026-87739-an-improper-authentication-vulnerability-in-papercut-mf-ng-allows)
- [PaperCut NG/MF path traversal in Scan-to-Fax component](https://junglewise.ai/threats/cve-2026-82077-an-improper-limitation-of-a-pathname-to-a-restricted-directory)
- [PaperCut NG/MF sandbox escape in device scripting](https://junglewise.ai/threats/cve-2026-14780-a-vulnerability-exists-in-the-papercut-ng-mf-platform-s-device)
- [PaperCut NG/MF unsafe reflection vulnerability](https://junglewise.ai/threats/cve-2026-82078-papercut-ng-mf-unsafe-reflection-vulnerability)
- [PaperCut NG/MF missing authentication for critical function](https://junglewise.ai/threats/cve-2026-81578-papercut-ng-mf-missing-authentication-for-critical-function)