CVE-2023-2533: PaperCut NG/MF CSRF in admin interface

CVE-2023-2533 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2025-07-28

PaperCut NG and MF are print management solutions used by organizations to manage and secure printing environments. A security flaw allows an attacker to trick a logged-in administrator into performing unintended actions by clicking a malicious link. This could lead to unauthorized changes in security settings or the execution of malicious code, potentially compromising the entire printing infrastructure and sensitive data.

Technologies: PaperCut Mf, PaperCut Ng. Vendors: PaperCut.

Quick answers

Is CVE-2023-2533 exploited in the wild?
Yes. CVE-2023-2533 is known to be exploited in the wild, first recorded on 28 July 2025. Treat it as urgent.
How severe is CVE-2023-2533?
Critical severity, with a CVSS score of 8.8, published 28 July 2025.
Which products and versions are affected?
PaperCut Mf up to (excluding) 20.1.8, 21.0.0 up to (excluding) 21.2.12, 22.0.0 up to (excluding) 22.1.1; PaperCut Ng up to (excluding) 20.1.8, 21.0.0 up to (excluding) 21.2.12, 22.0.0 up to (excluding) 22.1.1.
Is there a fix for CVE-2023-2533?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2023-2533 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2023-2533?
Check whether you run PaperCut Mf or PaperCut Ng at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Cross-Site Request Forgery (CSRF) vulnerability (CWE-352) exists in PaperCut NG/MF. The vulnerability is triggered when an authenticated administrator with an active session is deceived into interacting with a specially crafted malicious link or web page. Because the application fails to properly validate that requests are intentional and originate from the user, the attacker can perform actions with the administrator's privileges. This can result in the modification of critical security configurations or remote code execution. The vulnerability has been observed in active exploitation according to CISA. Patches are available in versions 20.1.8, 21.2.12, and 22.1.1.

Affected products

  • PaperCut PaperCut MF up to (excluding) 20.1.8, 21.0.0 up to (excluding) 21.2.12, 22.0.0 up to (excluding) 22.1.1
  • PaperCut PaperCut NG up to (excluding) 20.1.8, 21.0.0 up to (excluding) 21.2.12, 22.0.0 up to (excluding) 22.1.1

Timeline

  • 2023-06-01: advisory: Vendor security bulletin published
  • 2025-07-28: kev added: Added to CISA Known Exploited Vulnerabilities catalog

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