CVE-2023-27350
This vulnerability allows remote attackers to bypass authentication on affected installations of...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2023-27350- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
EUVDEUVD-2023-31126
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.
- Record
EUVD-2023-31126- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-cfg6-7x4x-p3pj
This vulnerability allows remote attackers to bypass authentication on affected installations of...
This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 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.
- Record
GHSA-cfg6-7x4x-p3pj- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
CISA KEV No score
PaperCut MF/NG Improper Access Control Vulnerability
PaperCut MF/NG contains an improper access control vulnerability within the SetupCompleted class that allows authentication bypass and code execution in the context of system.
- Record
CVE-2023-27350- Weakness
- CWE-284
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2023-27350- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-284
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | PaperCut PaperCutNG Authentication Bypass | 2023-03-13 |
| PoC in GitHub | MaanVader/CVE-2023-27350-POC | 2023-04-21 |
| PoC in GitHub | imancybersecurity/CVE-2023-27350-POC | 2023-04-21 |
| PoC in GitHub | horizon3ai/CVE-2023-27350 | 2023-04-22 |
| Exploit-DB | PaperCut NG/MG 22.0.4 - Authentication Bypass | 2023-04-25 |
| PoC in GitHub | adhikara13/CVE-2023-27350 | 2023-04-25 |
| Exploit-DB | PaperCut NG/MG 22.0.4 - Remote Code Execution (RCE) | 2023-05-23 |
| PoC in GitHub | Ap0dexMe0/CVE-2023-27350 | 2023-05-27 |
| PoC in GitHub | Jenderal92/CVE-2023-27350 | 2023-06-13 |
| PoC in GitHub | ASG-CASTLE/CVE-2023-27350 | 2024-04-19 |
Show 8 moreShow less
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | rasan2001/CVE-2023-27350-Ongoing-Exploitation-of-PaperCut-Remote-Code-Execution-Vulnerability | 2024-05-10 |
| PoC in GitHub | monke443/CVE-2023-27350 | 2025-03-09 |
| PoC in GitHub | 0xB0y426/CVE-2023-27350-PoC | 2025-04-14 |
| PoC in GitHub | Royall-Researchers/CVE-2023-27350 | 2025-07-05 |
| PoC in GitHub | dezso-dfield/CVE-2023-27350 | 2025-12-19 |
| PoC in GitHub | joaoaugustom/PaperCut-Authentication_Bypass_and_RCE | 2026-05-30 |
| PoC in GitHub | HORKimhab/CVE-2023-27350-CVE-2023-27351 | 2026-08-28 |
| Nuclei | PaperCut - Unauthenticated Remote Code Execution |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, Exploit-DB, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-27350 is a critical vulnerability (CVSS 9.8) in Papercut Ng, published April 20, 2023. CISA lists it as known to be exploited, since April 21, 2023. EUVD reports exploitation since April 21, 2023. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 100.0%, the 99th percentile. No source names a fixed version.
References
zerodayinitiative.com/advisories/ZDI-23-233
papercut.com/kb/Main/PO-1216-and-PO-1219
packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html
news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet