CVE-2021-21363 : faille élevée smartbear swagger-codegen (CVSS 7.0)

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.

Sévérité

Élevée (CVSS 7.0)

Vecteur CVSS

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

Exploitation active

Non signalée par la CISA

Publication

11 mars 2021

Dernière mise à jour

17 juin 2026

• smartbear swagger-codegen

• Fiche CVE-2021-21363 sur le NVD (NIST)
• github.com/swagger…
• github.com/swagger…