Vulnerability · Published Oct 14, 2021 · Assigned by Wordfence
CVE-2021-38346Brizy <= 2.3.11 Authenticated Unrestricted File Upload and Path Traversal
High 8.8
In plain English
A high-severity cross-site scripting in Brizy - Page Builder from Brizy.io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Brizy.io | Brizy - Page Builder | 2.3.11 – through 2.3.11 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H