CodeColorer < 0.10.1 – Admin+ Stored Cross-Site Scripting

The plugin does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

PoC

1. In the plugin’s settings, add the payload "> to the “Custom CSS Classes” field. 2. Save and when the page reloads, see XSS.