CVE-2023-39143

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-08-04. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
9.8EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 78%
  • Public exploit code is available (ssvc poc, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 78%CVSS: 9.8Exploit: ssvc poc · epss top5pct · epss high · public exploitExposed: 0

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

PaperCut NG and PaperCut MF before 22.1.3 on Windows allow path traversal, enabling attackers to upload, read, or delete arbitrary files. This leads to remote code execution when external device integration is enabled (a very common configuration).

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
91(Attend)
EG Risk 91/100SSVC: Attend

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%
Exploitation79% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
78%
EPSS %ILE
100%
KEV
Not listed

Published

August 4, 2023

Last Modified

May 5, 2025

Advisory Details (2)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

Security Bulletin: July 2023 | PaperCut

https://www.papercut.com/kb/Main/securitybulletinjuly2023/
generic

CVE-2023-39143: PaperCut RCE | Horizon3.ai

https://www.horizon3.ai/cve-2023-39143-papercut-path-traversal-file-upload-rce-vulnerability/

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 19× 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.

  1. 2026-07-30 16:26 UTCEPSS rescore
  2. 2026-07-30 16:26 UTCEPSS rescore
  3. 2026-07-28 15:34 UTCEPSS rescore
  4. 2026-07-26 14:52 UTCEPSS rescore
  5. 2026-07-24 14:16 UTCEPSS rescore
  6. 2026-07-23 02:25 UTCEG score recompute
  7. 2026-07-22 23:12 UTCEG score recompute
  8. 2026-07-22 14:06 UTCEPSS rescore
  9. 2026-07-21 15:23 UTCEPSS rescore
  10. 2026-07-21 15:23 UTCEPSS rescore
  11. 2026-07-20 17:06 UTCEPSS rescore
  12. 2026-07-15 16:56 UTCEPSS rescore
  13. 2026-07-15 16:56 UTCEPSS rescore
  14. 2026-07-12 05:45 UTCEPSS rescore
  15. 2026-07-09 19:08 UTCEPSS rescore
  16. 2026-07-09 19:08 UTCEPSS rescore
  17. 2026-07-06 16:26 UTCEPSS rescore
  18. 2026-07-06 16:26 UTCEPSS rescore
  19. 2026-07-02 16:59 UTCEPSS rescore
  20. 2026-06-30 23:21 UTCEPSS rescore
  21. 2026-06-30 23:21 UTCEPSS rescore
  22. 2026-06-28 14:06 UTCEPSS rescore
  23. 2026-06-28 14:06 UTCEPSS rescore
  24. 2026-06-28 04:55 UTCEPSS rescore
  25. 2026-06-28 04:55 UTCEPSS rescore
Show 28 more
  1. 2026-06-25 13:48 UTCEPSS rescore
  2. 2026-06-25 13:48 UTCEPSS rescore
  3. 2026-06-24 14:04 UTCEPSS rescore
  4. 2026-06-24 14:03 UTCEPSS rescore
  5. 2026-06-23 21:31 UTCEPSS rescore
  6. 2026-06-23 21:31 UTCEPSS rescore
  7. 2026-06-19 19:24 UTCEPSS rescore
  8. 2026-06-19 19:24 UTCEPSS rescore
  9. 2026-06-17 17:51 UTCEPSS rescore
  10. 2026-06-17 17:51 UTCEPSS rescore
  11. 2026-06-15 17:47 UTCEPSS rescore
  12. 2026-06-13 22:59 UTCEPSS rescore
  13. 2026-06-13 22:59 UTCEPSS rescore
  14. 2026-06-12 23:10 UTCEPSS rescore
  15. 2026-06-12 23:10 UTCEPSS rescore
  16. 2026-06-10 22:17 UTCEPSS rescore
  17. 2026-06-10 13:21 UTCEPSS rescore
  18. 2026-06-05 22:46 UTCEPSS rescore
  19. 2026-06-05 22:46 UTCEPSS rescore
  20. 2026-05-29 13:43 UTCEPSS rescore
  21. 2026-05-29 13:43 UTCEPSS rescore
  22. 2026-05-28 13:43 UTCEPSS rescore
  23. 2026-05-28 13:43 UTCEPSS rescore
  24. 2026-05-26 07:18 UTCEPSS rescore
  25. 2026-05-26 07:18 UTCEPSS rescore
  26. 2026-05-26 07:18 UTCEPSS rescore
  27. 2026-05-24 20:07 UTCEG score recompute
  28. 2026-05-24 20:07 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2023/CVE-2023-39143.yaml
    First seen Jan 1, 2023

    PaperCut < 22.1.3 - Path Traversal

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-39143?
CVE-2023-39143 is a critical vulnerability published on August 4, 2023. PaperCut NG and PaperCut MF before 22.1.3 on Windows allow path traversal, enabling attackers to upload, read, or delete arbitrary files. This leads to remote code execution when external device integration is enabled (a very common configuration).
When was CVE-2023-39143 disclosed?
CVE-2023-39143 was first published in the National Vulnerability Database on August 4, 2023, with the most recent update on May 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-39143 actively exploited?
CVE-2023-39143 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78% probability of exploitation in the next 30 days, which ranks it in the top 0.5% of all scored CVEs.
What is the CVSS score of CVE-2023-39143?
CVE-2023-39143 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-39143?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-39143, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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