CVE-2021-21428 | BDVDB-2026-153405 Detail

OpenAPIToolsopenapi-generator

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: local.

Weaknesses#

CWE-269 Improper Privilege Management

References#

Exploit#

No public exploit known

History#

Version 12021-05-10Record published in the CVE List.
Version 22024-08-03Most recent update recorded in the CVE List.

Published

Published: 2021-05-10
Last modified: 2024-08-03

Vendor information

Vendor: OpenAPITools
Product: openapi-generator

All OpenAPITools vulnerabilities

Score

9.3 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 29.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Privilege Escalation

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 5.1.0
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.3 Critical

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

Metric breakdown
Attack Vector	Local
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).