CVE-2021-38346 Brizy <= 2.3.11 Authenticated Unrestricted File Upload and Path Traversal
Authenticated attackers can upload executable files via path traversal and double extensions, potentially achieving remote code execution on vulnerable WordPress sites.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-38346?
CVE-2021-38346 is a high-severity vulnerability in Brizy.io Brizy - Page Builder, published on 14 Oct 2021. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Which versions are affected by CVE-2021-38346?
It affects 1 product.
Products include Brizy Brizy-Page Builder.
How do I fix CVE-2021-38346?
No fix has been published for CVE-2021-38346 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-38346 being exploited?
There is no known exploitation of CVE-2021-38346 in the wild and no public exploit code.
Other vulnerabilities in Brizy.io Brizy - Page Builder
Sources
Also known as GHSA-gq9p-f72g-3m6j.