Brizy Page Builder <= 2.3.11 - Authenticated File Upload and Path Traversal

Unrestricted Upload of File with Dangerous Type
CVE CVE-2021-38346
CVSS High (8.8)
Publicly Published October 13, 2021
Last Updated January 22, 2024
Researcher Ram
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug brizy (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 2.3.11
Patched Version
  • 2.3.12
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