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CVE-2023-27351PaperCut NG/MF Improper Authentication Vulnerability
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.
7.5 HIGHEPSS 78.05%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.5 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 8.2 | HIGH | 3.0zdi (CNA) | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N |
CISA required action
⚡ Known exploited · remediation due May 4, 2026
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Details
- CVE ID
- CVE-2023-27351
- Status
- Analyzed
- Assigner (CNA)
- zdi
- Published
- Apr 20, 2023
- Last modified
- 2026-10-01 19:17 UTC
- Weaknesses
- CWE-287 · Improper Authentication
Affected Products
As published by the CNA in the CVE record.
PaperCutNG1 version range
- 22.0.5 (Build 63914)