CVE-2021-47899

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 v4.0

6.9 MEDIUMCVSS: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

CVSS v3.1

4.0 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS

0.26% chance of exploitation in the next 30 days, 18th percentile

Published

2026-01-23

Proof-of-concept exploits (1)

• https://www.exploit-db.com/exploits/49534

References

• CVE Record
• NVD entry

Related

• CVE-2021-47898
• CVE-2021-47900
• CVE-2021-47897
• CVE-2021-47901
• CVE-2021-47896
• CVE-2021-47902