Exploited vulnerability · CISA KEV

Is CVE-2025-31161 exploited? Yes: in CISA KEV since 7 Apr 2025

Gociux · CrushFTP · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-31161, CrushFTP Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 7 Apr 2025, 4 days after it was published. It is known to be used in ransomware campaigns. It affects CrushFTP. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What it is

CrushFTP contains an authentication bypass vulnerability in the HTTP authorization header that allows a remote unauthenticated attacker to authenticate to any known or guessable user account (e.g., crushadmin), potentially leading to a full compromise.

What to do

1. Check whether you run it. Look for CrushFTP in your asset inventory, including appliances and cloud images. Stack check lists every exploited CrushFTP CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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 3 Apr 2025.
4. Get told next time. Email alerts when CISA adds a CVE for CrushFTP.

Other exploited CVEs in CrushFTP

• CVE-2025-54309: CrushFTP Unprotected Alternate Channel Vulnerability (22 Jul 2025)
• CVE-2024-4040: CrushFTP VFS Sandbox Escape Vulnerability (24 Apr 2024)

References

• www.crushftp.com/crush11wiki/Wiki.jsp
• nvd.nist.gov/vuln/detail/CVE-2025-31161

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 2025 · CrushFTP scorecard · act-now radar.