GraphQL - Moderately critical - Access bypass - SA-CONTRIB-2021-029

Project: GraphQL
Date: 2021-September-15
Security risk: Moderately critical 13∕25
Vulnerability: Access bypass
CVE IDs: CVE-2020-13675

Description

This advisory addresses a similar issue to Drupal core - Moderately critical - Access bypass - SA-CORE-2021-008.

The GraphQL module allows file uploads through its HTTP API. The module does not correctly run all file validation, which causes an access bypass vulnerability. An attacker might be able to upload files that bypass the file validation process implemented by modules on the site.

This vulnerability is mitigated by four factors:

1. The GraphQL module must be enabled on the site.
2. The GraphQL schema must expose a file upload by using the helper "src/GraphQL/Utility/FileUpload.php" in the module.
3. An attacker must have access to that file upload via the GraphQL API.
4. The site must employ a file validation module.

Solution

Install the latest version:

If you use the GraphQL module 8.x-4.x for Drupal 8.x or 9.x, upgrade to GraphQL 8.x-4.2
If you use the GraphQL module 8.x-3.x for Drupal 8.x no action is needed as a result of this advisory as the 8.x-3.x branch is not affected by this issue.