CVE-2023-27351

HIGH 8.2

⚠️ CISA KEV

CVSS Score

8.2

EPSS Score

44.6%

EPSS Percentile

98th

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.

CWE	CWE-287
Vendor	papercut
Product	ng
Published	Apr 20, 2023
Last Updated	Apr 20, 2026

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CVSS v3 Breakdown

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

Affected Versions

PaperCut / NG

22.0.5 (Build 63914)

References

NVD ↗ CVE.org ↗ EPSS Data ↗

papercut.com: https://www.papercut.com/kb/Main/PO-1216-and-PO-1219 zerodayinitiative.com: https://www.zerodayinitiative.com/advisories/ZDI-23-232/ cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27351

Credits

Piotr Bazydlo (@chudypb) of Trend Micro Zero Day Initiative