What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-07-28
• EPSS: 28.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-20 · updated 2026-06-17
• Weakness: CWE-352

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.

Affected products

• PaperCut MF: before 20.1.8; from 21.0.0 before 21.2.12; from 22.0.0 before 22.1.1 — fixed in 20.1.8, 21.2.12, 22.1.1
• PaperCut NG: before 20.1.8; from 21.0.0 before 21.2.12; from 22.0.0 through 22.1.1 — fixed in 20.1.8, 21.2.12

How to fix

Upgrade to a fixed version: PaperCut MF 20.1.8, 21.2.12, 22.1.1; PaperCut NG 20.1.8, 21.2.12. Check the vendor advisory for mitigations.

References

• https://fluidattacks.com/advisories/arcangel/
• https://www.papercut.com/kb/Main/SecurityBulletinJune2023
• https://fluidattacks.com/advisories/arcangel/
• https://www.papercut.com/kb/Main/SecurityBulletinJune2023
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-2533

Get alerted when CVE-2023-2533 or the next vulnerability affects your stack