PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability
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…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 3 / 5
- KEV catalog (CISA)28 Jul 2025
- Exploited in EUVD (ENISA)28 Jul 2025
- Used by ransomwareno
- EPSS above 10 %28.8%
- No account, over the networkno
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
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
- 22.0.10 <2.1.1
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
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Published
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Exploitation reported (ENISA)
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Added to the KEV catalog
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CISA remediation due date
-
EPSS peak: 29.2%
References
Other exploited vulnerabilities from the same vendor
- CVE-2026-82078PaperCut NG/MF Unsafe Reflection Vulnerability7.5 · Actively exploited
- CVE-2026-81578PaperCut NG/MF Missing Authentication for Critical Function Vulnerability8.5 · Actively exploited
- CVE-2023-27351PaperCut NG/MF Improper Authentication Vulnerability8.6 · Background exploitation
- CVE-2023-27350PaperCut MF/NG Improper Access Control Vulnerability9.9 · Background exploitation