PT-2026-56613 · Monsta Limited Of New Zealand · Monstaftp

Valentin Lobstein + 1 · Published 2026-07-08 · Updated 2026-07-08 · CVE-2026-60105

Mitre

CVSS v3.1

8.6

High

Base vector

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

Monsta FTP before 2.14.5 contains a server-side request forgery vulnerability in the fetchRemoteFile action caused by an incomplete IP blocklist check in the isBlockedIP() function, which fails to detect embedded IPv4 addresses within IPv4-mapped IPv6 addresses. An unauthenticated attacker can obtain a CSRF token from the public getSystemVars endpoint and submit a fetchRemoteFile request with a source URL resolving to an IPv4-mapped address, causing the server to issue HTTP requests to internal services and write responses to an attacker-controlled FTP destination, enabling retrieval of cloud instance metadata credentials.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-60105

Affected Products

Monstaftp

References · 3

• https://monstaftp.com/notes · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-60105 · Security Note
• https://vulncheck.com/advisories/monsta-ftp-ssrf-via-ipv4-mapped-ipv6-address-bypass · Note