CVE detail
CVE-2023-27351: PaperCut NG/MF Improper Authentication Vulnerability
Source: CISA Known Exploited Vulnerabilities catalog · back to feed
Vendor / product
PaperCut · NG/MF
- Date added (KEV)
- Apr 20, 2026
- CISA due date
- May 04, 2026
- Ransomware campaign use
- Known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Scorifya interpretation
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Plain English
Technical detail
From CISA
PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.
https://www.papercut.com/kb/Main/PO-1216-and-PO-1219 ; https://nvd.nist.gov/vuln/detail/CVE-2023-27351
See what attackers can see on your domain
This vulnerability is on CISA's Known Exploited Vulnerabilities list, so it is being exploited in the wild right now, including in ransomware campaigns. Scorifya can't test for PaperCut directly, but in about 30 seconds it shows what your own domain exposes publicly across TLS, security headers, DNS, and cookies: the surface attackers probe first.
SOC 2 compliance
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See Scorifya Controls →References
- https://www.papercut.com/kb/Main/PO-1216-and-PO-1219Vendor Advisory
- https://www.papercut.com/kb/Main/PO-1216-and-PO-1219Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-23-232/Third Party AdvisoryVDB Entry
- https://www.zerodayinitiative.com/advisories/ZDI-23-232/Third Party AdvisoryVDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27351US Government Resource
Other recent CVEs from PaperCut
- CVE-2023-2533NG/MF, PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability
- CVE-2023-27350MF/NG, PaperCut MF/NG Improper Access Control Vulnerability