CVE-2023-46253

Squidex is an open source headless CMS and content management hub. Affected versions are subject to an arbitrary file write vulnerability in the backup restore feature which allows an authenticated attacker to gain remote code execution (RCE). Squidex allows users with the squidex.admin.restore permission to create and restore backups. Part of these backups are the assets uploaded to an App. For each asset, the backup zip archive contains a .asset file with the actual content of the asset as well as a related AssetCreatedEventV2 event, which is stored in a JSON file. Amongst other things, the JSON file contains the event type (AssetCreatedEventV2), the ID of the asset (46c05041-9588-4179-b5eb-ddfcd9463e1e), its filename (test.txt), and its file version (0). When a backup with this event is restored, the BackupAssets.ReadAssetAsync method is responsible for re-creating the asset. For this purpose, it determines the name of the .asset file in the zip archive, reads its