CVE-2021-21429
4.0 · MEDIUMOverview
CVE-2021-21429 is a medium-severity vulnerability affecting openapi-generator openapi_generator. It was published on April 27, 2021 and has a CVSS 3.1 base score of 4.0 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.0, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
OpenAPI Generator allows generation of API client libraries, 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. OpenAPI Generator maven plug-in creates insecure temporary files during the process. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.
Remediation
Check the references section for vendor advisories and patches from openapi-generator. Update openapi_generator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| openapi-generator | openapi_generator | >= 0, < 5.1.0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-21429?
CVE-2021-21429 is a medium-severity vulnerability affecting openapi-generator openapi_generator. It was published on April 27, 2021 and has a CVSS 3.1 base score of 4.0 (MEDIUM).
How severe is CVE-2021-21429?
This vulnerability has a CVSS 3.1 base score of 4.0, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-21429?
Check the references section for vendor advisories and patches from openapi-generator. Update openapi_generator to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-21429?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-21429 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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