WordPress Survey Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Survey plugin for WordPress, affecting all versions through 1.1. The issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with administrator-level permissions to inject arbitrary scripts. These scripts are executed when users access the compromised pages. This vulnerability is specific to multi-site installations where unfiltered HTML is disabled.

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 administrator privileges can navigate to the Survey plugin's admin settings. Here, they can inject a script into a field that does not properly sanitize input. Once the script is saved, it will execute whenever a user accesses the page that contains the injected script.