Exploited vulnerability · CISA KEV

Is CVE-2023-27350 exploited? Yes: in CISA KEV since 21 Apr 2023

Gociux · PaperCut MF/NG · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-27350, PaperCut MF/NG Improper Access Control Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 21 Apr 2023, 1 days after it was published. It is known to be used in ransomware campaigns. It affects PaperCut MF/NG. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

PaperCut MF/NG contains an improper access control vulnerability within the SetupCompleted class that allows authentication bypass and code execution in the context of system.

What to do

1. Check whether you run it. Look for MF/NG in your asset inventory, including appliances and cloud images. Stack check lists every exploited PaperCut CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 20 Apr 2023.
4. Get told next time. Email alerts when CISA adds a CVE for PaperCut.

References

• www.papercut.com/kb/Main/PO-1216-and-PO-1219
• nvd.nist.gov/vuln/detail/CVE-2023-27350

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in April 2023 · PaperCut scorecard · act-now radar.