HIGHVulnerability
Verified
Global

CISA KEV: PaperCut NG/MF — PaperCut NG/MF Improper Authentication Vulnerability

·Source: CISA KEV

Updated:

Executive Summary

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

Analysis

PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class. Added to CISA Known Exploited Vulnerabilities catalog on 2026-04-20. Remediation due: 2026-05-04. Known to be used in ransomware campaigns.

Indicators of Compromise (1)

CVE (1)
CVE-2023-27351
NVDMITRE CVE
Source Attribution

Originally published by CISA KEV on Apr 20, 2026. Verified by: CISA.

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