| Title | Blossom Blossom ≤ 1.17.1 Path Traversal |
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| Description | A Path Traversal vulnerability exists in Blossom versions 1.17.1 and earlier. The issue is found in the /picture/file/upload endpoint, where user-supplied filenames are concatenated into the filesystem path and processed by the BLOSManager.put() method without proper validation. This allows authenticated attackers to utilize directory traversal sequences (e.g., ../) to write arbitrary files outside the intended upload directory. |
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| Source | ⚠️ https://fx4tqqfvdw4.feishu.cn/docx/WmA3dzNfto3AxlxoFlqcu5amnXe |
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| User | xcxr (UID 86629) |
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| Submission | 02/04/2026 14:10 (6 months ago) |
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| Moderation | 02/17/2026 11:24 (13 days later) |
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| Status | Accepted |
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| VulDB entry | 346274 [Blossom up to 1.17.1 File Upload BLOSManager.java put path traversal] |
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| Points | 20 |
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