| Titre | casdoor commit 0585ecf Missing Authorization |
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| Description | Unauthenticated Arbitrary File Upload via /api/upload-resource
Summary
The POST /api/upload-resource endpoint in Casdoor accepts uploads from completely unauthenticated callers. The Casbin authorization policy whitelists this route for the anonymous principal (p, *, *, POST, /api/upload-resource, *, *), and the controller's helper that resolves the target storage provider (GetProviderFromContext) returns the provider directly when a ?provider= query parameter is supplied, bypassing the RequireSignedIn check that gates the fallback path. Any storage provider configured by an administrator (S3, Aliyun OSS, Local File System, Azure Blob, etc.) becomes a public write destination. The resulting Resource record is registered under the attacker-supplied owner / user / application query parameters, so the upload appears as if it were performed by an arbitrary legitimate user. When the storage provider serves uploaded files back (Local File System provider exposes /files/<path>), the attacker can retrieve the file with no authentication, creating a fully unauthenticated read-after-write primitive against the host.
https://github.com/casdoor/casdoor/ |
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| La source | ⚠️ https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resource |
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| Utilisateur | geochen (UID 78995) |
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| Soumission | 08/07/2026 15:52 (il y a 2 mois) |
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| Modérer | 01/09/2026 19:55 (2 months later) |
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| Statut | Accepté |
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| Entrée VulDB | 397791 [Casdoor jusqu’à 4.0.0 upload-resource API controllers/resource.go authentification faible] |
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| Points | 20 |
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