-template-..-2f..-2f..-2f..-2froot-2f

The string "-template-..-2F..-2F..-2F..-2Froot-2F" is a technical pattern typically associated with Path Traversal (or Directory Traversal) vulnerabilities in web applications.  Deep Text / Technical Breakdown 

—an attacker can navigate backward through the directory structure. Anatomy of the Attack -template-..-2F..-2F..-2F..-2Froot-2F

grep -E '\-template\-\.\.\-2F\.\.\-2F\.\.\-2F\.\.\-2Froot\-2F' access.log

Or more simply, when considering the dot notation for directories: The string "-template-

Always sanitize, canonicalize, and restrict file paths. In cybersecurity, the smallest encoding trick can lead to the biggest breach. Or more simply, when considering the dot notation

If the server does:

Are you looking to secure a web application against this type of input, or are you researching a specific security report?