CVE-2023-6551: Verot Class.upload.php

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

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

• Verot Class.upload.php: affected versions not specified

Published 2024-01-04. Last modified 2026-06-17.