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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| contao/contao | composer | >= 4.9.0, < 4.9.40 | 4.9.40 |
| contao/contao | composer | >= 4.13.0, < 4.13.21 | 4.13.21 |
| contao/contao | composer | >= 5.1.0, < 5.1.4 | 5.1.4 |
The patch adds critical validation in ajaxTreeView (isValid check + directory existence/mount verification) and fixes the isMounted logic. The vulnerability stemmed from 1) unvalidated user input in ajaxTreeView's folder parameter, and 2) over-permissive mount check in isMounted. These functions directly handle path resolution and access control for file manager operations.
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