Submit #751988: Blossom Blossom ≤ 1.17.1 Path Traversalinfo

TitelBlossom Blossom ≤ 1.17.1 Path Traversal
BeschreibungA 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.
Quelle⚠️ https://fx4tqqfvdw4.feishu.cn/docx/WmA3dzNfto3AxlxoFlqcu5amnXe
Benutzer
 xcxr (UID 86629)
Einreichung04.02.2026 14:10 (vor 6 Monaten)
Moderieren17.02.2026 11:24 (13 days later)
StatusAkzeptiert
VulDB Eintrag346274 [Blossom bis 1.17.1 File Upload BLOSManager.java put Directory Traversal]
Punkte20

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