Vulnerability · Published Jan 23, 2026 · Assigned by VulnCheck
CVE-2021-47899YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability
Medium 4.0
In plain English
A medium-severity unrestricted file upload in YetiShare File Hosting Script from Mfscripts. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).
Severity (CVSS 3.1)4.0Medium
Exploit odds (30 days)0.3%top 77.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
YetiShare File Hosting Script 5.1.0 contains a server-side request forgery vulnerability that allows attackers to read local system files through the remote file upload feature. Attackers can exploit the url parameter in the url_upload_handler endpoint to access sensitive files like /etc/passwd by using file:/// protocol.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mfscripts | YetiShare File Hosting Script | v5.1.0 |
Weakness: CWE-434 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- ExploitDB-49534 exploit
- Vendor Homepage product
- Software Product Page product
- VulnCheck Advisory: YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability third-party-advisory