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CVE-2023-27351: PaperCut NG/MF Improper Authentication Vulnerability
PaperCut NG/MF · in CISA KEV since 2026-04-20
2026-04-20added to KEV
2026-05-04federal remediation due date
78.05%EPSS exploit probability (30 days) 99.6th percentile
7.5 HIGHCVSS 3.1
Knownknown ransomware use
1,096days from NVD publication to KEV
What it is
PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-287 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD published | 2023-04-20 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-27351.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.