WordPress PayPal Donation Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the WordPress PayPal Donation plugin, affecting all versions through 1.01. The issue arises from inadequate input sanitization and output escaping of user-supplied shortcode attributes, including 'amount', 'email', 'title', 'return_url', 'cancel_url', 'ccode', and 'image'. The vulnerability is exploitable by authenticated users with Contributor-level access and above, allowing them to inject arbitrary scripts that execute when the injected page is accessed.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Reproduction

To reproduce this vulnerability, an authenticated user with Contributor-level access or higher can use the 'donate' shortcode and include a script in one of the vulnerable attributes, such as 'amount' or 'email'. Once the shortcode is saved, the injected script will execute when the page is viewed.

Remediation

No known patch is available. It is recommended to uninstall the affected plugin and find a replacement.