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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| backpack/filemanager | composer | >= 3.0.0, < 3.0.9 | 3.0.9 |
| backpack/filemanager | composer | < 2.0.2 | 2.0.2 |
The vulnerability stems from the insecure deserialization of the 'mimes' parameter. The commit introduces a new BackpackElfinderController that adds decryption and validation(). Prior to the patch, the code likely used the original ElfinderController's showPopup method (or similar) which directly deserialized user-controlled 'mimes' data without proper checks. The fix involves decrypting the parameter first, indicating that the previous implementation lacked this security step, making deserialization of untrusted data possible.
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