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CVE-2025-31161: CrushFTP Authentication Bypass Vulnerability

criticalknown exploitedpublic exploitCVE-2025-31161
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 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.

CSIRTS triage

vendor: CrushFTPproduct: CrushFTPAuthentication bypass
What
An authentication bypass vulnerability allows a remote unauthenticated attacker to authenticate to any known user account.
Who is affected
Users of CrushFTP with known or guessable user accounts.
Urgency
Immediate remediation is necessary due to active exploitation and critical severity.
Action
Update CrushFTP to the latest version.

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
2025-04-07
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-31161

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-2025-31161coverage & exploitation statusNVD · CVE.org

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