Answer:
The hacker, put the secret message in anchor attribute of html
Explanation:
Barrier Background Check" has been hacked by a hacker and they put a secret message.
if you see the behind code of the website, in <a> (attribute where the links of services are given) the class is assigned.
In that class, the hackers have put their code or secret messages and user when clicking on this link, class with executed on the browser, and user-directed toward what is written in the class. This class may either CSS or may contain other codes such as javascript code etc.
if you see the link behind code, there is a class, not a link. This class is written either in the head of HTML or access from other folders and links placed in the head tag.
The proper way of linking some other pages of website or use of anchor tag is given below
<a href="https://example.com">Website</a>
if you want to give link of other page of same website
<a href="../pages/mypage.html">Website</a>
Here, in this scenario, hackers put the class inside the link attribute for putting the secret message on website
