CVE-2020-13128 json
An issue was discovered in Manolo GWTUpload 1.0.3.
published 2020-05-17 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-5404
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.65% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/manolo/gwtupload/issues/33 referenced PoC, tagged "exploit" by a source, unverified
- logicaltrust.net https://logicaltrust.net/blog/2020/02/gwt-upload.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/manolo/gwtupload/issues/33
exploit, third-party-advisory
-
logicaltrust.net
/blog/2020/02/gwt-upload.html
exploit, third-party-advisory
Sources
- CVE List CVE-2020-13128
- NVD CVE-2020-13128
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.