CVE-2023-6551 (published 2024-01-04T16:04:34.995Z)
As a simple library, class.upload.php does not perform an in-depth check on uploaded files, allowing a stored XSS vulnerability when the default configuration is used. 


Developers must be aware of that fact and use extension whitelisting accompanied by forcing the server to always provide content-type based on the file extension. 


The README has been updated to include these guidelines.



Affected products: Vendor: class.upload.php
Product: class.upload.php
Versions: 0