As advised by the Sucuri Blog, please click the “update” button on your WordPress dashboard ASAP.
Vulnerabilities have been found in the following WordPress plugins:
Jetpack
WordPress SEO
All in one SEO
UpDraft Plus
iThemes Exchange
and many more plugins
Any plugins that need updated will be highlighted in your plugins area or in the dashboard area. Please click the update buttons for each plugin needing to be updated.
You can read more about this vulnerability affecting multiple WordPress plugins here.