CVE-2023-27350

9.8

CVSS
Critical

PUBLISHED

This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication...

Exploited in the wild Used in malware Remote Low complexity No user interaction

Vendor: PaperCut
Product: NG
Published: Apr 20, 2023
EPSS: —

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 malware ransomware nuclei_scanner metasploit

CVSS scores

CVSS v3.0 9.8 Critical

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation status

Exploited in the wild

Recorded 2023-04-21 00:00:00 UTC · Source

Used in malware

Recorded 2023-04-21 00:00:00 UTC · Source

SSVC decision points

Exploitation: active
Automatable: Yes
Technical impact: total

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source	Added
CISA	Apr 21, 2023

Scanner integrations

Scanner	Reference	Detected
Metasploit	https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/papercut_ng_auth_bypass.rb	Apr 28, 2025
Nuclei	https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-27350.yaml	Apr 25, 2025

Potential proof of concepts

These PoCs are unverified and could contain malware. Use at your own risk.

papercut_ng_auth_bypass

metasploit · Created Unknown

Metasploit module for CVE-2023-27350

monke443/CVE-2023-27350

github · Created 2025-03-09 18:08:42 UTC · 3 stars

Unauthenticated remote command execution in Papercut service allows an attacker to execute commands due to improper access controls in the SetupCompleted Java class.

Jenderal92/CVE-2023-27350

github · Created 2023-06-13 22:13:24 UTC · 0 stars

Python 2.7

ThatNotEasy/CVE-2023-27350

github · Created 2023-05-27 11:32:35 UTC · 2 stars

Perfom With Massive Authentication Bypass In PaperCut MF/NG

adhikara13/CVE-2023-27350

github · Created 2023-04-25 20:51:23 UTC · 8 stars

Exploit for Papercut CVE-2023-27350. [+] Reverse shell [+] Mass checking

horizon3ai/CVE-2023-27350

github · Created 2023-04-22 21:34:06 UTC · 51 stars

Proof of Concept Exploit for PaperCut CVE-2023-27350