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CVE-2025-54309: CrushFTP Unprotected Alternate Channel Vulnerability

criticalknown exploitedpublic exploitCVE-2025-54309
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
CrushFTP contains an unprotected alternate channel vulnerability. When the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS.

CSIRTS triage

vendor: CrushFTPproduct: CrushFTPPrivilege escalation
What
CrushFTP contains an unprotected alternate channel vulnerability that allows remote attackers to obtain admin access via HTTPS.
Who is affected
Deployments of CrushFTP that are not using the DMZ proxy feature.
Urgency
Immediate remediation is necessary as the vulnerability is actively exploited and rated critical.
Action
Update to the latest version of CrushFTP.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-07-22
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-54309

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-54309coverage & exploitation statusNVD · CVE.org

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