HIGH🚩 CISA KEV⚡ EXPLOIT🇵🇱 Wersja polska

CVE-2023-27351

CVSS 7.5v3.1pub. 2023-04-20upd. 2026-04-21

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Papercut Mf
APP
Papercut
15.0 – 20.1.7 (excl.)21.0.0 – 21.2.11 (excl.)22.0.0 – 22.0.9 (excl.)
Papercut Ng
APP
Papercut
15.0 – 20.1.7 (excl.)21.0.0 – 21.2.11 (excl.)22.0.0 – 22.0.9 (excl.)

CISA KEV — detailsi

Vendori: PaperCut ↗
Producti: NG/MF
Added to KEVi: April 20, 2026
Remediation deadline (US Federal)i: May 4, 2026(overdue)
Ransomwarei: Active ransomware campaigns exploit this vulnerability

🔧Advisory PaperCut↗🇺🇸CISA KEV (original)↗

Required action (CISA)i

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA descriptioni

PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.

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