CVE-2024-4712: Arbitrary File Creation in PaperCut NG/MF Web Print Image Handler

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-14 · updated 2026-06-17
Weakness: CWE-77

Description

An arbitrary file creation vulnerability exists in PaperCut NG/MF that only affects Windows servers with Web Print enabled. This specific flaw exists within the image-handler process, which can incorrectly create files that don’t exist when a maliciously formed payload is provided. This can lead to local privilege escalation. Note: This CVE has been split into two (CVE-2024-4712 and CVE-2024-8405) and it’s been rescored with a "Privileges Required (PR)" rating of low, and “Attack Complexity (AC)” rating of low, reflecting the worst-case scenario where an Administrator has granted local login access to standard network users on the host server.

Affected products

PaperCut MF: before 23.0.9 — fixed in 23.0.9
PaperCut NG: before 23.0.9 — fixed in 23.0.9

How to fix

Upgrade to a fixed version: PaperCut MF 23.0.9; PaperCut NG 23.0.9. Check the vendor advisory for mitigations.

References

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