GiveWP Donation Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the GiveWP Donation Plugin and Fundraising Platform for WordPress. This issue affects all versions through 4.16.3 and arises from inadequate input sanitization and output escaping. The vulnerability allows authenticated attackers with give worker-level access or higher to inject arbitrary scripts into pages. These scripts are executed when a user accesses the injected page, specifically after a donor clicks the 'Share on Twitter' button in the Sequoia donation confirmation view. At this point, the unescaped 'twitter_message' value is processed within a JavaScript template literal, leading to the execution of the injected script.

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 give worker-level access or higher can inject a script via the 'twitter_message' Sequoia Template Setting. After saving the injection, the script will execute when the 'Share on Twitter' button is clicked in the Sequoia donation confirmation view.

Remediation

Users are advised to update the GiveWP Donation Plugin to version 4.16.4 or a newer patched version.