WordPress Yuzo Related Posts plugin before 5.12.94 is vulnerable to cross-site scripting
because it mistakenly expects that is_admin() verifies that the
request comes from an admin user (it actually only verifies that the
request is for an admin page). An unauthenticated attacker can consequently inject
a payload into the plugin settings, such as the
yuzo_related_post_css_and_style setting.
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