The Simple Quotation WordPress plugin through 1.3.2 does not have CSRF check when creating or editing a quote and does not sanitise and escape Quotes. As a result, attacker could make a logged in admin create or edit arbitrary quote, and put Cross-Site Scripting payloads in them
https://wpscan.com/vulnerability/f6e15a23-8f8c-47c2-8227-e277856d8251