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CVE-2023-27351

Published: Apr 20, 2023Updated: Apr 21, 2026 Sources: CVE List NVD BDUCWE-287
7.5HIGH
NVD MITRE
EPSS Score
77.4%
Top 0.5%
CISA KEV
Active Exploitation
Since Apr 20, 2026
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

Description

This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). Authentication is not required to exploit this vulnerability. The specific flaw exists within the SecurityRequestFilter class. The issue results from improper implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-19226.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-287

Affected Products

PaperCut
commercial·USaka paper cut
NGOn-premSecurity Product
Security Products / vuln-mgmt-scanner
papercut mfOn-premDesktop App
Security Products / vuln-mgmt-scanner
papercut ngOn-premDesktop App
Security Products / vuln-mgmt-scanner
PaperCut Software International Pty Ltd
commercial
PaperCut NGOn-prem
Enterprise Software / itsm-monitoring
PaperCut MFOn-prem
Enterprise Software / itsm-monitoring

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Apr 20, 2026
Remediation due:May 4, 2026
Ransomware:Known ransomware use

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.

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://www.papercut.com/kb/Main/PO-1216-and-PO-1219#product-status-and-next-steps
papercut.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
cisa.gov
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv
cisa.gov
and 3 more references View all →

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