CVE-2023-2533: PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2025-07-28. EPSS: 28.6% chance of exploitation in the next 30 days.

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.

Affected products

• PaperCut PaperCut MF: before 20.1.8 (fixed in 20.1.8); from 21.0.0, before 21.2.12 (fixed in 21.2.12); from 22.0.0, before 22.1.1 (fixed in 22.1.1)
• PaperCut PaperCut NG: before 20.1.8 (fixed in 20.1.8); from 21.0.0, before 21.2.12 (fixed in 21.2.12); from 22.0.0, up to and including 22.1.1

Published 2023-06-20. Last modified 2026-06-17.