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CVE-2021-47899

MEDIUM
Unrestricted Upload of File with Dangerous Type (CWE-434)
2026-01-23 disclosure@vulncheck.com
SSRF
4.0
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.0 MEDIUM
AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 26, 2026 - 15:03 vuln.today
Public exploit code
CVE Published
Jan 23, 2026 - 17:16 nvd
MEDIUM 4.0

DescriptionCVE.org

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.

AnalysisAI

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. [CVSS 4.0 MEDIUM]

Technical ContextAI

Classified as CWE-434 (Unrestricted Upload of File with Dangerous Type). 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 ProductsAI

Component: url_upload_handler.

RemediationAI

Monitor vendor advisories for a patch. Validate file types by content. Store uploads outside web root.

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CVE-2021-47899 vulnerability details – vuln.today
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