Note: This vulnerability (CVE-2023-27351) was originally published in 2023, however CISA added it to the Known Exploited Vulnerabilities (KEV) catalog on 2026-04-20 due to detected active exploitation.
Summary
| Parameter | Value |
|---|---|
| CVE ID | CVE-2023-27351 |
| Alert Source | CISA KEV - Active Exploitation |
| CVE Publication Year | 2023 |
| Date Published | 2026-04-20 |
| Vendor | PaperCut |
| Product | NG/MF |
| CVSS Score | 7.5 (high) |
| EPSS Score | 44.6% (percentile: 98%) |
| CISA KEV | Yes - confirmed active exploitation |
| Ransomware | Not confirmed |
| Remediation Deadline | 2026-05-04 |
Vulnerability Description
PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.
Required Actions
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Who Is Affected?
This vulnerability affects NG/MF by PaperCut. Check if your organization uses this software and requires updates.
Sources
Need help securing your systems? nFlo team offers vulnerability management and 24/7 SOC services. Contact us.
