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.
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This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 74.1%, top 1% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
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.
November 7, 2025
December 10, 2025
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
MonstaFTP Unauthenticated File Upload
Open source ↗Monsta FTP downloadFile Remote Code Execution
Open source ↗Monsta FTP <= 2.11.2 - Unauthenticated Remote Code Execution
Open source ↗See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-34299
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CWE-434