What is CVE-2020-14057?

CVE-2020-14057 is a critical-severity vulnerability in Monstaftp Monsta FTP, classified under Externally Controlled Reference to a Resource in Another Sphere. CVSS score: 9.8/10. Published 2020-07-01.

How severe is CVE-2020-14057?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Monstaftp Monsta FTP

CVE-2020-14057

Monsta FTP 2.10.1 or below allows external control of paths used in filesystem operations. This allows attackers to read and write arbitrary local files, allowing an attacker to gain remote code execution in common deployments.

Published 2020-07-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.026 (84.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Monstaftp Monsta FTP

Weakness classification (CWE)

CWE-610 — Externally Controlled Reference to a Resource in Another Sphere

References

www.monstaftp.com/notes/ (Release Notes, Vendor Advisory)
github.com/sbaresearch/advisories/tree/public/2019/SBA-ADV-20191203-01_Monsta_F… (Third Party Advisory)

Frequently asked questions

What is CVE-2020-14057?: CVE-2020-14057 is a critical-severity vulnerability in Monstaftp Monsta FTP, classified under Externally Controlled Reference to a Resource in Another Sphere. CVSS score: 9.8/10. Published 2020-07-01.
How severe is CVE-2020-14057?: Critical severity. CVSS v3 base score is 9.8 out of 10.