VULNERABILITY INTELLIGENCE

CVE-2021-21428

CVSS score9.3 CRITICAL

EPSS probability0.35%

CISA KEVNot currently listed

Published2021-05-10

Last modified2026-06-17

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

Description

Openapi generator is a java tool which allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. openapi-generator-online creates insecure temporary folders with File.createTempFile during the code generation process. The insecure temporary folders store the auto-generated files which can be read and appended to by any users on the system. The issue has been patched with `Files.createTempFile` and released in the v5.1.0 stable version.

Weakness classification

security-advisories@github.com: CWE-269
nvd@nist.gov: CWE-668

Primary references

security-advisories@github.com — Patch, Third Party Advisory
security-advisories@github.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory