Live › vulnerability › CVE-2023-27351
Go to dashboardPaperCut NG and PaperCut MF print management servers contain an improper authentication flaw in the SecurityRequestFilter class. A remote attacker can bypass login on affected installs and reach administrative functions.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| PaperCut NG/MF | vendor | – | – |
| papercut mf | vendor | >= 15.0, < 20.1.7 | 20.1.7 |
| papercut mf | vendor | >= 21.0.0, < 21.2.11 | 21.2.11 |
| papercut mf | vendor | >= 22.0.0, < 22.0.9 | 22.0.9 |
| papercut ng | vendor | >= 15.0, < 20.1.7 | 20.1.7 |
| papercut ng |
| vendor |
| >= 21.0.0, < 21.2.11 |
| 21.2.11 |
| papercut ng | vendor | >= 22.0.0, < 22.0.9 | 22.0.9 |
Unknown from the sources.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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