Twittee Text Tweet WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Twittee Text Tweet plugin for WordPress, affecting all versions through 1.0.8. The issue arises from inadequate input sanitization and output escaping of user-supplied shortcode attributes. The vulnerability allows authenticated attackers with Contributor-level access and above to inject arbitrary web scripts into pages, which are executed when users access the injected pages.

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 insert a shortcode using the 'id' attribute without proper sanitization. The 'id' attribute can be exploited to inject scripts by breaking out of the HTML id context and adding event handlers. Additionally, the 'tweet', 'content', 'balloon', and 'theme' attributes can be used to inject unsanitized data into inline JavaScript, further facilitating the cross-site scripting attack.