If you’re using plugin, update to 3.5.3 both free and Pro plugins.
You can get more information in their email:
The issue is being actively exploited by hackers.
Just a quick recap:
You can also manually download and install these updates directly via these links:
Social Warfare Pro:
If you are not able to immediately apply this update we recommend that you disable Social Warfare and Social Warfare Pro until you can apply the V3.5.3 update.