Vulnerability details

CVE-2025-34299

Monsta Limited of New Zealand Monsta FTP

Monsta FTP <= 2.11 Unauthenticated Arbitrary File Upload

CVSS 4.0

9.3Critical

Official 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.

CVSS scores

Score	Version	Source	Vector
9.3Critical	4.0	CVEProject cvelistV5 (CNA) (VulnCheck)	`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`

Affected products

Vendor	Product	Versions	Source
Monsta Limited of New Zealand	Monsta FTP	v ≤ 2.11	CVEProject cvelistV5 (CNA)

References and advisories

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-upload third-party-advisory

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Details

Published: 2025-11-07
Last updated: 2026-05-14
State: Published
Assigner (CNA): VulnCheck

Exploit prediction (EPSS)

72.68%

Probability of exploitation in 30 days

99.4%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-434
Unrestricted Upload of File with Dangerous Type