CVE-2021-47899

MEDIUM EPSS 17.1%

Published Jan 23, 20265mo ago · Modified Jun 17, 20262w ago

6.9 CVSS 4.0

Medium

Published Jan 23, 2026 5mo ago

Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score

6.9

Exploitability

—

Impact

—

Vector string

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope X

Threat Intelligence

EPSS Exploit Probability

17.1% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-434 Unrestricted Upload of File with Dangerous Type Resource Mgmt

References 4

mfscripts.com https://mfscripts.com
exploit-db.com https://www.exploit-db.com/exploits/49534
vulncheck.com https://www.vulncheck.com/advisories/yetishare-file-hosting-script-remote-file-upload-ssrf-vulnerability
yetishare.com https://yetishare.com

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.