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CVE-2021-47899

YetiShare File Hosting Script 5.1.0 Remote File Upload SSRF Vulnerability

Published: Jan 23, 2026Updated: Jan 26, 2026 Sources: CVE List NVDCWE-434
NVD MITRE
4.0CVSSMEDIUM
EPSS Score
0.3%
Top 83.1%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available

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 Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-434

Affected Products

YetiShare File Hosting ScriptMfscripts
On-prem
Web & CMS Plugins / site-builder
mfscriptsWeb & CMS Pluginsaka yetishare, yetishare file hosting script

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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MITRE ATT&CK

3 techniques
Command and Control
Initial Access
Persistence
View detailed technique mapping

References

https://mfscripts.com
mfscripts.com
https://www.exploit-db.com/exploits/49534
exploit-db.com
https://www.vulncheck.com/advisories/yetishare-file-hosting-script-remote-file-upload-ssrf-vulnerability
vulncheck.com
and 1 more references View all →

Timeline

Published
Jan 23, 2026
Last Updated
Jan 26, 2026

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