The Autoptimize WordPress plugin before 3.1.7 does not sanitise and escape the settings imported from a previous export, allowing high privileged users (such as an administrator) to inject arbitrary javascript into the admin panel, even when the unfiltered_html capability is disabled, such as in a multisite setup.
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https://wpscan.com/vulnerability/ddb4c95d-bbee-4095-aed6-25f6b8e63011 | vdb entry exploit technical description |