---
id: CVE-2021-47899
title: YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability
summary: >-
  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_h…
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-434
vendor: Mfscripts
product: YetiShare File Hosting Script
affected:
  - yetishare_file_hosting_script v5.1.0
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-01-23T20:55:38.276190Z'
exploitAvailable: true
published: '2026-01-23'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T21:44:53.452Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2021-47899'
references:
  - url: 'https://www.exploit-db.com/exploits/49534'
    label: ExploitDB-49534
  - url: 'https://mfscripts.com'
    label: Vendor Homepage
  - url: 'https://yetishare.com'
    label: Software Product Page
  - url: >-
      https://www.vulncheck.com/advisories/yetishare-file-hosting-script-remote-file-upload-ssrf-vulnerability
    label: >-
      VulnCheck Advisory: YetiShare File Hosting Script 5.1.0 Remote File Upload
      SSRF Vulnerability
tags:
  - cve.org
  - exploit-available
epss: 0.00294
epssPercentile: 0.19847
ingestedAt: '2026-10-01T23:03:32.844Z'
---

## Overview

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

- `yetishare_file_hosting_script v5.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.