Privilege escalation in Openapi-Generator Openapi Generator
CVE-2021-21428
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.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (26.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Openapi-Generator Openapi Generator
- Openapitools Openapi-Generator — versions < 5.1.0
Weakness classification (CWE)
References
- github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-23x4-m842-fm… (Exploit, Third Party Advisory)
- github.com/OpenAPITools/openapi-generator/pull/8788 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21428?
- CVE-2021-21428 is a critical-severity vulnerability in Openapi-Generator Openapi Generator, classified under Improper Privilege Management. CVSS score: 9.3/10. Published 2021-05-10.
- How severe is CVE-2021-21428?
- Critical severity. CVSS v3 base score is 9.3 out of 10.