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CVE-2020-9447

20
FAUCET Score

CVE-2020-9447 describes a cross-site scripting (XSS) vulnerability in GwtUpload 1.0.3, specifically within its file upload functionality. An attacker can exploit this by uploading a file with a malicious filename containing JavaScript, leading to XSS. This medium-severity vulnerability (CVSS 6.1) could allow attackers to steal data or alter website appearance, requiring user interaction for successful exploitation. While no active exploitation or public exploit code is currently known, and community discussion is minimal, organizations using affected GwtUpload versions should be aware of this potential risk.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.3CPE matchmatch criteria
cpe:2.3:a:gwtupload_project:gwtupload:1.0.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.76%
Probability of exploitation in next 30 days
EPSS Percentile
51.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0076 is in the 58th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

mavenGHSA-5chj-xprr-7qqxmedium

Cross-site Scripting in GwtUpload

Apr 22, 2021

References

github.com / manolo/gwtupload/issues/32
ExploitIssue TrackingThird Party Advisory
coresecurity.com / advisories/gwtupload-xss-file-upload-functionality
ExploitThird Party Advisory