CVE-2023-27351
PaperCut NG/MF Improper Authentication Vulnerability
CVSS
—
No CVSS
EPSS
78.1%
p100
KEV
YES
Apr 20, 2026
Exploit Today
80
0-100
Published: — · Last modified: —
Product
PaperCut / NG/MF
Vulnerability
PaperCut NG/MF Improper Authentication Vulnerability
Added to KEV
Apr 20, 2026
Remediate by
May 4, 2026
Known ransomware use
Yes
Summary 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