What’s Vulnerable › Vulnerabilities

CVE-2020-13128

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-05-18 · updated 2026-06-17
• Weakness: CWE-434

Description

An issue was discovered in Manolo GWTUpload 1.0.3. server/UploadServlet.java (the servlet for handling file upload) accepts a delay parameter that causes a thread to sleep. It can be abused to cause all of a server's threads to sleep, leading to denial of service.

Affected products

• Gwtupload Project Gwtupload: 1.0.3

References

• https://github.com/manolo/gwtupload/issues/33
• https://logicaltrust.net/blog/2020/02/gwt-upload.html
• https://github.com/manolo/gwtupload/issues/33
• https://logicaltrust.net/blog/2020/02/gwt-upload.html

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