CVE-2023-27351 HIGH

CVE-2023-27351

Vendor Papercut

Product NG

Weakness CWE-287 · Improper authentication

KEV Status Known Exploited

Ransomware Used in campaigns

Published April 20, 2023

Last update April 21, 2026

View on NVD All CVEs

CVSS base score

8.2/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality High

Integrity Low

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

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.

CISA mandated remediation

02CISA 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.

Key dates

03Disclosure timeline

April 20, 2023 CVE published

April 21, 2026 Record updated

External resources

04References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2023-27351 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/287.html CISA KEV Reference https://www.papercut.com/kb/Main/PO-1216-and-PO-1219 CISA KEV Reference https://nvd.nist.gov/vuln/detail/CVE-2023-27351