| 标题 | casdoor commit 0585ecf Missing Authorization |
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| 描述 | 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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| 来源 | ⚠️ https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resource |
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| 用户 | geochen (UID 78995) |
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| 提交 | 2026-07-08 15時52分 (2 月前) |
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| 管理 | 2026-09-01 19時55分 (2 months later) |
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| 状态 | 已接受 |
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| VulDB条目 | 397791 [Casdoor 直到 4.0.0 upload-resource API controllers/resource.go 弱身份验证] |
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| 积分 | 20 |
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