MicroPayments WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the MicroPayments WordPress plugin, specifically in the 'videowhisper_content_upload_guest' shortcode. This issue affects all versions of the plugin up to and including 2.9.29. The vulnerability arises from inadequate input sanitization and output escaping of user-supplied attributes, allowing authenticated attackers with contributor-level access or higher to inject arbitrary web scripts. These scripts are executed when a user accesses the compromised page.

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.

Remediation

Users are advised to update the MicroPayments WordPress plugin to version 2.9.30 or a newer patched version.