CVE-2023-39143

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 80.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-08-04 · updated 2026-06-17
Weakness: CWE-22

Description

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).

Affected products

PaperCut MF: before 22.1.3 — fixed in 22.1.3
PaperCut NG: before 22.1.3 — fixed in 22.1.3

How to fix

Upgrade to a fixed version: PaperCut MF 22.1.3; PaperCut NG 22.1.3. Check the vendor advisory for mitigations.

References

https://www.horizon3.ai/cve-2023-39143-papercut-path-traversal-file-upload-rce-vulnerability/
https://www.papercut.com/kb/Main/securitybulletinjuly2023/
https://www.horizon3.ai/cve-2023-39143-papercut-path-traversal-file-upload-rce-vulnerability/
https://www.papercut.com/kb/Main/securitybulletinjuly2023/

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