Multiple directory traversal vulnerabilities in Koha 3.14.x before 3.14.16, 3.16.x before 3.16.12, 3.18.x before 3.18.08, and 3.20.x before 3.20.1 allow remote attackers to read arbitrary files via a ..%2f (dot dot encoded slash) in the template_path parameter to (1) svc/virtualshelves/search or (2) svc/members/search.
https://seclists.org/fulldisclosure/2015/Jun/80
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=14408
https://www.exploit-db.com/exploits/37388/
https://packetstormsecurity.com/files/132458/Koha-ILS-3.20.x-CSRF-XSS-Traversal-SQL-Injection.html
https://koha-community.org/security-release-koha-3-20-1/
https://koha-community.org/security-release-koha-3-18-8/
https://koha-community.org/security-release-koha-3-16-12/