We saw a critical vulnerability in Struts2 that would leave web applications vulnerable to remote execution of code and enable direct access to customer-critical data. Early the next morning, we saw a second severe Struts2 zero-day appear.   Then on Thursday we heard that 143 million consumer records were stolen from Equifax as a direct result of the Struts2 vulnerability……..

http://blog.sonatype.com/struts2-vulnerability-cracks-equifax