CVE-2023-27350

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-04-21), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
99
EG Risk 99/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
CISA SSVC: Attend at low mission impact; Act at medium or high.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low mission impact and as soon as possible at medium or high, and watch the vendor's advisory for the fix.
EPSS PROB
100%
EPSS %ILE
99th
KEV
⚠ Exploited

CISA SSVCAttend at low mission impact; Act at medium or high.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation sooner than your standard update timelines at low mission impact and as soon as possible at medium or high, and watch the vendor's advisory for the fix.

Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

April 20, 2023

Last Modified

October 27, 2025

Advisory Details (7)

Auto-updated Oct 1, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Packet Storm - Human Validation

http://packetstormsecurity.com/files/172512/PaperCut-NG-MG-22.0.4-Remote-Code-Execution.html
generic

Packet Storm - Human Validation

http://packetstormsecurity.com/files/172022/PaperCut-NG-MG-22.0.4-Authentication-Bypass.html
generic

Packet Storm - Human Validation

http://packetstormsecurity.com/files/171982/PaperCut-MF-NG-Authentication-Bypass-Remote-Code-Execution.html
generic

ZDI-23-233 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-23-233/
generic

URGENT MF/NG vulnerability bulletin (March 2023) | PaperCut

https://www.papercut.com/kb/Main/PO-1216-and-PO-1219
generic🔴 Active Exploitation

Update 2: Increased exploitation of PaperCut drawing blood around the Internet | SOPHOS

https://news.sophos.com/en-us/2023/04/27/increased-exploitation-of-papercut-drawing-blood-around-the-internet/
generic

Packet Storm - Human Validation

http://packetstormsecurity.com/files/172780/PaperCut-PaperCutNG-Authentication-Bypass.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 47× in last 7d / 203× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 844 total refreshes for this CVE.

  1. 2026-10-04 12:47 UTCGHSA enrichment
  2. 2026-10-04 08:55 UTCGHSA enrichment
  3. 2026-10-04 05:03 UTCGHSA enrichment
  4. 2026-10-04 01:12 UTCGHSA enrichment
  5. 2026-10-03 21:21 UTCGHSA enrichment
  6. 2026-10-03 17:29 UTCGHSA enrichment
  7. 2026-10-03 13:38 UTCGHSA enrichment
  8. 2026-10-03 09:46 UTCGHSA enrichment
  9. 2026-10-03 05:54 UTCGHSA enrichment
  10. 2026-10-03 02:02 UTCGHSA enrichment
  11. 2026-10-02 22:10 UTCGHSA enrichment
  12. 2026-10-02 18:19 UTCGHSA enrichment
  13. 2026-10-02 18:19 UTCGHSA enrichment
  14. 2026-10-02 14:27 UTCGHSA enrichment
  15. 2026-10-02 10:32 UTCGHSA enrichment
  16. 2026-10-02 06:40 UTCGHSA enrichment
  17. 2026-10-02 02:46 UTCGHSA enrichment
  18. 2026-10-01 22:53 UTCGHSA enrichment
  19. 2026-10-01 19:02 UTCGHSA enrichment
  20. 2026-10-01 15:10 UTCGHSA enrichment
  21. 2026-10-01 11:19 UTCGHSA enrichment
  22. 2026-10-01 07:27 UTCGHSA enrichment
  23. 2026-10-01 03:36 UTCGHSA enrichment
  24. 2026-09-30 23:44 UTCGHSA enrichment
  25. 2026-09-30 19:51 UTCGHSA enrichment
Show 75 more
  1. 2026-09-30 16:00 UTCGHSA enrichment
  2. 2026-09-30 12:07 UTCGHSA enrichment
  3. 2026-09-30 08:16 UTCGHSA enrichment
  4. 2026-09-30 04:23 UTCGHSA enrichment
  5. 2026-09-30 00:31 UTCGHSA enrichment
  6. 2026-09-29 20:38 UTCGHSA enrichment
  7. 2026-09-29 16:45 UTCGHSA enrichment
  8. 2026-09-29 12:51 UTCGHSA enrichment
  9. 2026-09-29 08:58 UTCGHSA enrichment
  10. 2026-09-29 05:06 UTCGHSA enrichment
  11. 2026-09-29 01:14 UTCEG score recompute
  12. 2026-09-29 01:14 UTCGHSA enrichment
  13. 2026-09-28 21:23 UTCGHSA enrichment
  14. 2026-09-28 17:31 UTCGHSA enrichment
  15. 2026-09-28 13:39 UTCGHSA enrichment
  16. 2026-09-28 09:48 UTCGHSA enrichment
  17. 2026-09-28 05:56 UTCGHSA enrichment
  18. 2026-09-28 02:05 UTCGHSA enrichment
  19. 2026-09-27 22:13 UTCGHSA enrichment
  20. 2026-09-27 21:51 UTCCISA KEV update
  21. 2026-09-27 18:22 UTCGHSA enrichment
  22. 2026-09-27 14:30 UTCGHSA enrichment
  23. 2026-09-27 10:38 UTCGHSA enrichment
  24. 2026-09-27 06:46 UTCGHSA enrichment
  25. 2026-09-27 02:53 UTCGHSA enrichment
  26. 2026-09-26 23:01 UTCGHSA enrichment
  27. 2026-09-26 19:10 UTCGHSA enrichment
  28. 2026-09-26 15:18 UTCGHSA enrichment
  29. 2026-09-26 11:26 UTCGHSA enrichment
  30. 2026-09-26 07:32 UTCGHSA enrichment
  31. 2026-09-26 03:40 UTCGHSA enrichment
  32. 2026-09-25 23:47 UTCGHSA enrichment
  33. 2026-09-25 19:56 UTCGHSA enrichment
  34. 2026-09-25 19:35 UTCCISA KEV update
  35. 2026-09-25 16:04 UTCGHSA enrichment
  36. 2026-09-25 14:55 UTCCISA KEV update
  37. 2026-09-25 12:11 UTCGHSA enrichment
  38. 2026-09-25 08:19 UTCGHSA enrichment
  39. 2026-09-25 04:27 UTCGHSA enrichment
  40. 2026-09-25 00:36 UTCGHSA enrichment
  41. 2026-09-24 20:44 UTCGHSA enrichment
  42. 2026-09-24 19:31 UTCCISA KEV update
  43. 2026-09-24 16:52 UTCGHSA enrichment
  44. 2026-09-24 13:00 UTCGHSA enrichment
  45. 2026-09-24 09:09 UTCGHSA enrichment
  46. 2026-09-24 05:17 UTCGHSA enrichment
  47. 2026-09-24 01:25 UTCGHSA enrichment
  48. 2026-09-23 21:34 UTCGHSA enrichment
  49. 2026-09-23 17:42 UTCGHSA enrichment
  50. 2026-09-23 13:50 UTCGHSA enrichment
  51. 2026-09-23 09:58 UTCGHSA enrichment
  52. 2026-09-23 06:07 UTCGHSA enrichment
  53. 2026-09-23 02:15 UTCGHSA enrichment
  54. 2026-09-22 22:23 UTCGHSA enrichment
  55. 2026-09-22 19:36 UTCCISA KEV update
  56. 2026-09-22 18:31 UTCGHSA enrichment
  57. 2026-09-22 14:40 UTCGHSA enrichment
  58. 2026-09-22 10:47 UTCGHSA enrichment
  59. 2026-09-22 06:55 UTCGHSA enrichment
  60. 2026-09-22 03:04 UTCGHSA enrichment
  61. 2026-09-21 23:12 UTCGHSA enrichment
  62. 2026-09-21 19:20 UTCGHSA enrichment
  63. 2026-09-21 19:09 UTCCISA KEV update
  64. 2026-09-21 15:28 UTCGHSA enrichment
  65. 2026-09-21 11:36 UTCGHSA enrichment
  66. 2026-09-21 07:44 UTCGHSA enrichment
  67. 2026-09-21 03:52 UTCGHSA enrichment
  68. 2026-09-21 00:00 UTCGHSA enrichment
  69. 2026-09-20 20:08 UTCGHSA enrichment
  70. 2026-09-20 16:16 UTCGHSA enrichment
  71. 2026-09-20 12:24 UTCGHSA enrichment
  72. 2026-09-20 08:32 UTCGHSA enrichment
  73. 2026-09-20 04:40 UTCGHSA enrichment
  74. 2026-09-20 00:48 UTCGHSA enrichment
  75. 2026-09-19 20:56 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (2 Metasploit modules) (6 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Metasploitexploit/multi/http/papercut_ng_auth_bypass✓ verified
    First seen Apr 21, 2023

    PaperCut MF/NG auth bypass + script execution chain. Used by Cl0p and LockBit.

    Open source ↗
  • Metasploitexploit/multi/http/papercut_ng_auth_bypass✓ verified
    First seen Mar 13, 2023

    PaperCut PaperCutNG Authentication Bypass

    Open source ↗
  • GitHub PoCmonke443/CVE-2023-27350
    First seen Mar 9, 2025

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

    Open source ↗
  • GitHub PoCAp0dexMe0/CVE-2023-27350
    First seen May 27, 2023

    Perfom With Massive Authentication Bypass In PaperCut MF/NG

    Open source ↗
  • Exploit-DBEDB-51452
    First seen May 23, 2023

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

    Open source ↗
  • Exploit-DBEDB-51391
    First seen Apr 25, 2023

    PaperCut NG/MG 22.0.4 - Authentication Bypass

    Open source ↗
  • GitHub PoCadhikara13/CVE-2023-27350
    First seen Apr 25, 2023

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

    Open source ↗
  • GitHub PoChorizon3ai/CVE-2023-27350
    First seen Apr 22, 2023

    Proof of Concept Exploit for PaperCut CVE-2023-27350

    Open source ↗
  • GitHub PoCimancybersecurity/CVE-2023-27350-POC
    First seen Apr 21, 2023
    Open source ↗
  • GitHub PoCMaanVader/CVE-2023-27350-POC
    First seen Apr 21, 2023

    A simple python script to check if a service is vulnerable

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2023-27350?
CVE-2023-27350 is a critical vulnerability published on April 20, 2023. 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.…
When was CVE-2023-27350 disclosed?
CVE-2023-27350 was first published on April 20, 2023, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-27350 actively exploited?
Yes. CISA added CVE-2023-27350 to the Known Exploited Vulnerabilities catalog on April 21, 2023, affecting PaperCut MF/NG. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2023-27350?
CVE-2023-27350 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2023-27350?
CVE-2023-27350 affects PaperCut MF/NG.
How do I remediate CVE-2023-27350?
No fix for CVE-2023-27350 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2023-27350

Explore →

Is Your Infrastructure Affected by CVE-2023-27350?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs