swagger-codegen is an open-source project which contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition. In swagger-codegen before version 2.4.19, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. This vulnerability is local privilege escalation because the contents of the `outputFolder` can be appended to by an attacker. As such, code written to this directory, when executed can be attacker controlled. For more details refer to the referenced GitHub Security Advisory. This vulnerability is fixed in version 2.4.19. Note this is a distinct vulnerability from CVE-2021-21364.

Configuration 1 (hide)



18 Mar 2021, 16:11

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown
v2 : 4.4
v3 : 7.0
CPE cpe:2.3:a:smartbear:swagger-codegen:*:*:*:*:*:*:*:*
References (MISC) - (MISC) - Patch, Third Party Advisory
References (CONFIRM) - (CONFIRM) - Exploit, Third Party Advisory

11 Mar 2021, 04:15

Type Values Removed Values Added


Published : 2021-03-11 03:15

Updated : 2021-03-18 16:11

NVD link : CVE-2021-21363

Mitre link : CVE-2021-21363

JSON object : View

Products Affected


  • swagger-codegen

Creation of Temporary File With Insecure Permissions


Creation of Temporary File in Directory with Insecure Permissions