{"containers":{"cna":{"affected":[{"product":"BookStack","vendor":"BookStackApp","versions":[{"status":"affected","version":">= 0.18.0, < 0.29.2"}]}],"descriptions":[{"lang":"en","value":"In BookStack greater than or equal to 0.18.0 and less than 0.29.2, there is an XSS vulnerability in comment creation. A user with permission to create comments could POST HTML directly to the system to be saved in a comment, which would then be executed/displayed to others users viewing the comment. Through this vulnerability custom JavaScript code could be injected and therefore ran on other user machines. This most impacts scenarios where not-trusted users are given permission to create comments. 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