CVE-2025-34299
Monsta FTP <= 2.11 Unauthenticated Arbitrary File Upload
- State
- Published
- Severity
- 9.3 Critical
- Published
- Nov 7, 2025
- Updated
- May 14, 2026
- Reserved
- Apr 15, 2025
Description
Monsta FTP versions 2.11 and earlier contain a vulnerability that allows unauthenticated arbitrary file uploads. This flaw enables attackers to execute arbitrary code by uploading a specially crafted file from a malicious (S)FTP server.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-434 Unrestricted Upload of File with Dangerous Type
Affected Products
| Product | Versions |
|---|---|
Monsta FTPMonsta Limited of New Zealand |
|
References
- https://www.monstaftp.com/notes/release-notespatch
- https://labs.watchtowr.com/whats-that-coming-over-the-hill-monsta-ftp-remote-code-execution-cve-2025-34299/technical-descriptionexploit
- https://www.vulncheck.com/advisories/monsta-ftp-unauthenticated-arbitrary-file-uploadthird-party-advisory
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