CVE-2021-21430
low-risk
Published 2021-05-10
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using `File.createTempFile` in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: `java` (jersey2, okhttp-gson (default library)), `scala-finch`. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.
Do I need to act?
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0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.2/10
Medium
LOCAL
/ LOW complexity
Affected Products (1)
Openapi Generator
Affected Vendors
References (6)
25
/ 100
low-risk
Severity
20/34 · Moderate
Exploitability
0/34 · Minimal
Exposure
5/34 · Minimal