CVE-2021-47899

YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability

MEDIUM
4
CVSS Score
Published: January 23, 2026 at 04:47 PM UTC
Updated: October 1, 2026 at 09:44 PM UTC
2 products affected across 1 vendorYetishareYetiShare File Hosting Script

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Severity
MEDIUM4
Exploit prediction
EPSS 0.3%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4MEDIUMVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-434

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