PixelYourSite WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the PixelYourSite WordPress plugin, specifically in versions through 11.2.0. This issue arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts. The injected scripts are executed when users access the affected pages. The vulnerability is linked to the 'pysTrafficSource' and 'pys_landing_page' parameters.

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 unauthenticated user can inject a script into the 'pysTrafficSource' or 'pys_landing_page' parameters. This can be done by sending a request that includes these parameters with the injected script. Once the script is injected, it will be executed whenever a user accesses the page where the script was injected.

Remediation

Users are advised to update the PixelYourSite WordPress plugin to version 11.2.0.1 or a newer patched version.