CVE-2023-27351 Known ransomware use

PaperCut NG/MF Improper Authentication Vulnerability

PaperCut — NG/MF

Added to KEV catalog: 20 April 2026
Federal remediation due date: 4 May 2026
Weakness classification (CWE): CWE-287

CISA Description

PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

https://www.papercut.com/kb/Main/PO-1216-and-PO-1219 ; https://nvd.nist.gov/vuln/detail/CVE-2023-27351

View on NVD View on MITRE CVE View full CISA catalog

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PaperCut MF/NG Improper Access Control Vulnerability

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