CVE-2023-27351
CVSS v3
7.5
HIGH
EPSS Score
47.9 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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.
CISA Known Exploited Vulnerability
- Date Added
- 2026-04-20
- Patch Due Date
- 2026-05-04
- Ransomware Use
- Unknown
Technical details
- Published
- 2023-04-20
Frequently asked questions
What is CVE-2023-27351?
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.
Is CVE-2023-27351 actively exploited?
Yes. CVE-2023-27351 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-05-04.
What is the CVSS score for CVE-2023-27351?
CVE-2023-27351 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2023-27351 affecting your environment?
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