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Dossier · Vulnerability

Actively exploited · CISA KEV · NVD published 2023-04-20

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.

  1. First PoC
  2. 1097 days →Metasploit
  3. 178 days →First cited attacker

Signals

Exploited in the wild
Yesadded 2023-04-21 · due 2023-05-12 · known ransomware use. An observation, not a forecast.
EPSS · 30-day forecast
100.0%Chance of exploitation in the next 30 days, 100th percentile of all CVEs. A forecast; KEV outranks it.
CVSS · NVD · CRITICAL
9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Internet exposure
not stated by sourcesNo exposure census on this CVE's dispatches.

Exploits

18 known · links only

GitHub PoCs · by trust, then stars14

  1. horizon3ai/CVE-2023-27350 ↗Trust ok 100

    Proof of Concept Exploit for PaperCut CVE-2023-27350

    ★ 57 · created 2023-04-22

  2. imancybersecurity/CVE-2023-27350-POC ↗Trust ok 100

    ★ 12 · created 2023-04-21

  3. adhikara13/CVE-2023-27350 ↗Trust ok 100

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

    ★ 9 · created 2023-04-25

  4. MaanVader/CVE-2023-27350-POC ↗Trust ok 100

    A simple python script to check if a service is vulnerable

    ★ 5 · created 2023-04-21

  5. monke443/CVE-2023-27350 ↗Trust ok 100

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

    ★ 4 · created 2025-03-09

  6. Ap0dexMe0/CVE-2023-27350 ↗Trust ok 100

    Perfom With Massive Authentication Bypass In PaperCut MF/NG

    ★ 2 · created 2023-05-27

  7. 0xB0y426/CVE-2023-27350-PoC ↗Trust ok 100

    PoC for CVE-2023-27350

    ★ 0 · created 2025-04-14

  8. ASG-CASTLE/CVE-2023-27350 ↗Trust ok 100

    ★ 0 · created 2024-04-19

  9. dezso-dfield/CVE-2023-27350 ↗Trust ok 100

    PaperCut NG/MG Authentication Bypass and Remote Code Execution (RCE) Exploit Tool. A standalone Bash implementation of the PaperCut exploit chain, featuring optional proxy support, automated session elevation, and dynamic command injection via the print scripting engine. Designed for security auditing and authorized penetration testing.

    ★ 0 · created 2025-12-19

  10. HORKimhab/CVE-2023-27350-CVE-2023-27351 ↗Trust ok 100

    CVE-2023-27350, CVE-2023-27351 - PaperCut - Draft or TODO

    ★ 0 · created 2026-08-28

  11. Jenderal92/CVE-2023-27350 ↗Trust ok 100

    Python 2.7

    ★ 0 · created 2023-06-13

  12. joaoaugustom/PaperCut-Authentication_Bypass_and_RCE ↗Trust ok 100

    This exploit is based on CVE-2023-27350 and was built upon the original exploit by horizon3ai and the Metasploit module.

    ★ 0 · created 2026-05-30

  13. rasan2001/CVE-2023-27350-Ongoing-Exploitation-of-PaperCut-Remote-Code-Execution-Vulnerability ↗Trust ok 100

    ★ 0 · created 2024-05-10

  14. Royall-Researchers/CVE-2023-27350 ↗Trust ok 100

    Papercut Vulnerability, Affected Versions are PaperCut MF or NG version 8.0 or later (excluding patched versions) on all OS platforms.

    ★ 0 · created 2025-07-05

Fake proof-of-concept repositories have been used to deliver malware to the researchers who run them. The trust verdict is our engine's heuristic over the repository (account age, what it ships, how its stars arrived); it is a reason to read the code first, not a finding about its author.

Metasploit1

  1. PaperCut PaperCutNG Authentication Bypass ↗

    This module leverages an authentication bypass in PaperCut NG. If necessary it updates Papercut configuration options, specifically the 'print-and-device.script.enabled' and 'print.script.sandboxed' options to allow for arbitrary code execution running in the builtin RhinoJS engine. This module logs at most 2 events in the application log of papercut. Each event is tied to modifcation of server settings.

    ruby · seen 2026-10-18

Exploit-DB2

  1. PaperCut NG/MG 22.0.4 - Authentication Bypass ↗

    created 2023-04-25

  2. PaperCut NG/MG 22.0.4 - Remote Code Execution (RCE) ↗

    created 2023-05-23

Nuclei1

  1. PaperCut - Unauthenticated Remote Code Execution ↗

    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.

    yaml · seen 2026-10-18

On the wire

0 dispatches

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