CVE-2021-38346
Brizy – Page Builder に報告された脆弱性
概要
The Brizy Page Builder plugin <= 2.3.11 for WordPress allowed authenticated users to upload executable files to a location of their choice using the brizy_create_block_screenshot AJAX action. The file would be named using the id parameter, which could be prepended with "../" to perform directory traversal, and the file contents were populated via the ibsf parameter, which would be base64-decoded and written to the file. While the plugin added a .jpg extension to all uploaded filenames, a double extension attack was still possible, e.g. a file named shell.php would be saved as shell.php.jpg, and would be executable on a number of common configurations.
影響を受けるバージョン
- 2.3.11 以下
対処方法
Brizy – Page Builder を 2.3.12 以降に更新してください。これで本脆弱性は解消します。
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