CVE-2023-39469: PaperCut MF

High severity, CVSS 7.2. EPSS: 61.4% chance of exploitation in the next 30 days.

PaperCut NG External User Lookup Code Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of PaperCut NG. Authentication is required to exploit this vulnerability. The specific flaw exists within the External User Lookup functionality. The issue results from the lack of proper validation of a user-supplied string before using it to execute Java code. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-21013.

Affected products

• PaperCut PaperCut MF: before 22.1.1 (fixed in 22.1.1)
• PaperCut PaperCut NG: before 22.1.1 (fixed in 22.1.1)

Published 2024-05-03. Last modified 2026-06-17.