Here is a text detailing what this means and how it works:
The server processed SSI directives inside the included file, exposing system files. The attacker found this entry point by searching inurl:view index.shtml on Bing (which still supported it at the time). inurl view index shtml 14 2021
So, what does this phrase reveal about the internet? When combined, these terms suggest a search query aimed at discovering a specific type of webpage or interface, possibly related to monitoring or tracking, which was created or updated in 2021. The presence of "shtml" implies that the webpage might use server-side includes to dynamically generate content. Here is a text detailing what this means