CVE-2023-2533
PaperCut NG/MF Cross-Site Request Forgery (CSRF) Vulnerability
PaperCut NG/MF
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 28 July 2025. US federal agencies were required to remediate it by 18 August 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 28.8%, which is higher than 98.2% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Frequently asked questions
Is CVE-2023-2533 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2023-2533.
What does CVE-2023-2533 affect?
CVE-2023-2533 affects PaperCut NG/MF. 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.
How severe is CVE-2023-2533?
CVE-2023-2533 is rated HIGH with a CVSS base score of 8.4. EPSS puts the probability of exploitation in the next 30 days at 28.8%, higher than 98.2% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 18 August 2025.
How should organisations respond to CVE-2023-2533?
Apply the vendor patch for PaperCut NG/MF as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.