CVE-2025-31161: CrushFTP Authentication Bypass Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

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.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Notes

https://www.crushftp.com/crush11wiki/Wiki.jsp?page=Update ; https://nvd.nist.gov/vuln/detail/CVE-2025-31161

Weakness behind it

CISA records this vulnerability as an instance of CWE-305. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-31161
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog