This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis β
Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: Monsta FTP (v2.11 & earlier) has an **unauthenticated arbitrary file upload** flaw.β¦
π₯ **Affected**: **Monsta FTP** versions **2.11 and earlier**. π Vendor: Monsta Limited (New Zealand). Over **5,000 instances** are currently exposed online.
Q4What can hackers do? (Privileges/Data)
π **Hacker Powers**: **Unauthenticated** access required. Attackers can execute **arbitrary PHP code**, upload web shells, and gain **full control** over the target server's file system and processes.
Q5Is exploitation threshold high? (Auth/Config)
β‘ **Threshold**: **LOW**. No authentication is needed to trigger the upload mechanism. The attack vector involves connecting to a malicious (S)FTP server, making it easy to exploit remotely.
Q6Is there a public Exp? (PoC/Wild Exploitation)
π£ **Exploits**: **YES**. Multiple public PoCs exist on GitHub (e.g., rxerium, Blackash-CVE). Nuclei templates are also available. **Active exploitation** in the wild has been reported.
Q7How to self-check? (Features/Scanning)
π **Self-Check**: Use **Nuclei** with the CVE-2025-34299 template. Look for exposed Monsta FTP instances. Check if the `downloadFile` endpoint is accessible without auth and allows fetching from external hosts.
Q8Is it fixed officially? (Patch/Mitigation)
π§ **Fix**: **YES**. The vendor has released patch notes. Users should update Monsta FTP to the latest version immediately. Refer to `https://www.monstaftp.com/notes/` for official guidance.
Q9What if no patch? (Workaround)
π§ **No Patch?**: **Mitigation**: Block outbound connections to untrusted (S)FTP servers. Restrict network access to the Monsta FTP interface. Disable the `downloadFile` feature if possible via config changes.
Q10Is it urgent? (Priority Suggestion)
π₯ **Urgency**: **CRITICAL**. High severity, unauthenticated, active exploitation, and widespread exposure (>5k instances). **Patch immediately** to prevent server compromise.