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CVE-2023-2533

PaperCut NG/MF Cross-Site Request Forgery (CSRF)

8.4 HIGHActively exploited (CISA KEV)Public exploitEPSS 28.6%
  1. Published20 Jun 2023
  2. Added to CISA KEV28 Jul 2025
  3. Remediation due18 Aug 2025
Actively exploited (CISA KEV)

PaperCut NG/MF contains a cross-site request forgery (CSRF) vulnerability, which, under specific conditions, could potentially enable an attacker to alter security settings or execute arbitrary code.

Added to KEV: 28 Jul 2025Federal remediation due: 18 Aug 2025

Description

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in PaperCut NG/MF, which, under specific conditions, could potentially enable an attacker to alter security settings or execute arbitrary code. This could be exploited if the target is an admin with a current login session. Exploiting this would typically involve the possibility of deceiving an admin into clicking a specially crafted malicious link, potentially leading to unauthorized changes.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Affected products

Papercut Mf≥ 21.0.0 < 21.2.12 · ≥ 22.0.0 < 22.1.1 · < 20.1.8
Papercut Ng≥ 21.0.0 < 21.2.12 · ≥ 22.0.0 ≤ 22.1.1 · < 20.1.8

Remediation

Fixed in
Papercut Mf≥ 21.2.12
Papercut Ng≥ 21.2.12

References

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Frequently asked

Is CVE-2023-2533 being actively exploited?

Yes. CVE-2023-2533 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 28 Jul 2025.

How severe is CVE-2023-2533?

CVE-2023-2533 has a CVSS 3.1 base score of 8.4, rated high. EPSS estimates a 28.6% probability of exploitation.

Which products are affected by CVE-2023-2533?

Affected products include Papercut Mf, Papercut Ng.

How do I fix CVE-2023-2533?

Upgrade affected software to a fixed version, for example Papercut Mf 21.2.12, Papercut Ng 21.2.12 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-2533 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.