CVE-2026-60105
Monsta FTP < 2.14.5 SSRF via IPv4-Mapped IPv6 Address Bypass
- State
- Published
- Severity
- 7.7 High
- Published
- Jul 8, 2026
- Updated
- Jul 14, 2026
- Reserved
- Jul 8, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N | VulnCheck |
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
Monsta FTPMonsta Limited of New Zealand |
|
References
- VulnCheck Blogtechnical-descriptionexploit
- Release Notespatchrelease-notes
- https://www.vulncheck.com/advisories/monsta-ftp-ssrf-via-ipv4-mapped-ipv6-address-bypassthird-party-advisory
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