CVE-2025-34299

Name: CVE-2025-34299
Creator: NVD / NIST
Published: 2025-11-07T14:15:49.92+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 72.03%

Last modified Jun 17, 2026

CVE-2025-34299 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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.. EPSS estimates a 72.03% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

9.3/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

72.03%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Monstaftp	Monsta Ftp	<= 2.11

References

https://labs.watchtowr.com/whats-that-coming-over-the-hill-monsta-ftp-remote-code-execution-cve-2025-34299/Exploit, Third Party Advisory
https://www.monstaftp.com/notes/Release Notes
https://www.vulncheck.com/advisories/monsta-ftp-unauthenticated-arbitrary-file-uploadThird Party Advisory

Timeline

Published: Nov 7, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-34299?

How severe is CVE-2025-34299?

CVE-2025-34299 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 72.03% probability of exploitation in the next 30 days.

How do I fix CVE-2025-34299?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-34299?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST