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The vulnerability stems from the serve_protected_file function in views.py, which handled user-supplied paths without properly resolving and validating absolute paths. The pre-patch code used os.path.join() without checking if the resolved path remained within PROTECTED_MEDIA_ROOT. The fix introduced os.path.abspath() resolution and an explicit startswith() check to ensure subdirectory containment. The GitHub issue #448 and commit diff both explicitly reference this function as the vulnerability location, with the patch adding critical path validation logic.
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| coderedcms | pip | >= 0, < 0.22.3 | 0.22.3 |
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