CVE-2020-9447

Name: CVE-2020-9447
Creator: NVD / NIST
Published: 2020-02-28T16:15:11.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2020-9447 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.74%

49.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Gwtupload Project	Gwtupload	1.0.3

References

https://github.com/manolo/gwtupload/issues/32Exploit, Issue Tracking, Third Party Advisory
https://www.coresecurity.com/advisories/gwtupload-xss-file-upload-functionalityExploit, Third Party Advisory
https://github.com/manolo/gwtupload/issues/32Exploit, Issue Tracking, Third Party Advisory
https://www.coresecurity.com/advisories/gwtupload-xss-file-upload-functionalityExploit, Third Party Advisory

Timeline

Published: Feb 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9447?

How severe is CVE-2020-9447?

CVE-2020-9447 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9447?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9447?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST