# CVE-2025-54309

CrushFTP 10 before 10.8.5 and 11 before 11.3.4_23, when the DMZ proxy feature is not used, mishandles AS2 validation and consequently allows remote attackers to obtain admin access via HTTPS, as exploited in the wild in July 2025.

- Page: https://www.vulneraibility.com/cve/CVE-2025-54309
- CVSS: 9.0
- Known exploited: yes, in CISA KEV since 2025-07-22; CISA due date 2025-08-12
- EPSS: 93.47%
- Unvetted proof-of-concept code on GitHub: 7 GitHub proofs of concept (first 2025-08-25)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-08-15)
- Weakness: CWE-420
- Published: 2025-07-18

## Affected versions

- CrushFTP: affected >= 10 and < 10.8.5; >= 11 and < 11.3.4_23

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025
- [other] https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/
- [other] https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-54309-detect-crushftp-vulnerability
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-54309-mitigate-crushftp-vulnerability
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-54309

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.