A security firm has determined that an attack against thousands of websites was conducted by threat actors through the vulnerable version of MailPoet plug-in for WordPress, which has received a patch at the beginning of the month. On July 22, Sucuri, a company providing services for protecting website integrity, announced a massive influx of broken WordPress websites, but could not determine the cause. The mystery was revealed the next day, in a blog post by Daniel Cid, CTO at …