CVE-2020-9447: Gwtupload Project Gwtupload

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

There is an XSS (cross-site scripting) vulnerability in GwtUpload 1.0.3 in the file upload functionality. Someone can upload a file with a malicious filename, which contains JavaScript code, which would result in XSS. Cross-site scripting enables attackers to steal data, change the appearance of a website, and perform other malicious activities like phishing or drive-by hacking.

Affected products

Published 2020-02-28. Last modified 2026-06-17.