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

> CVE-2023-27350: PaperCut MF/NG Improper Access Control Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-27350
Last updated: 2025-10-21T23:05:48Z

- Published: 2023-04-20 00:00 UTC · Updated: 2025-10-21 23:05 UTC · Assigner: zdi
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-04-21, federal due date 2023-05-12, ransomware use: Known
- CWE: CWE-284

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- PaperCut: NG

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-27350)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-27350)
- [http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html](http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html](http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html)
- [http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html](http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html)
- [http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html](http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html)
- [https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/](https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/)
- [https://www.papercut.com/kb/Main/PO-1216-and-PO-1219](https://www.papercut.com/kb/Main/PO-1216-and-PO-1219)
- [https://www.zerodayinitiative.com/advisories/ZDI-23-233/](https://www.zerodayinitiative.com/advisories/ZDI-23-233/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-27350 · Markdown: https://rewindex.com/cve/CVE-2023-27350.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-27350 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:58.170Z