CVE-2023-27351 — PaperCut NG/MF Improper Authentication Vulnerability
2026-04-20 • CISA Known Exploited Vulnerability
[event] PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | PaperCut |
| Product | NG/MF |
| CWE | CWE-287 |
| CVE ID | CVE-2023-27351 |
| Date Added | 2026-04-20 |
| Due Date | 2026-05-04 |
| Ransomware Campaign | Known — this vulnerability has been leveraged in ransomware campaigns |
> MITIGATION
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2026-05-04