CVE-2023-3486: PaperCut NG Unauthenticated File Upload

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 79.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-25 · updated 2026-06-17
Weakness: CWE-434

Description

An authentication bypass exists in PaperCut NG versions 22.0.12 and prior that could allow a remote, unauthenticated attacker to upload arbitrary files to the PaperCut NG host’s file storage. This could exhaust system resources and prevent the service from operating as expected.

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.papercut.com/kb/Main/SecurityBulletinJuly2023/
https://www.tenable.com/security/research/tra-2023-23
https://www.papercut.com/kb/Main/SecurityBulletinJuly2023/
https://www.tenable.com/security/research/tra-2023-23

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