Multiple cross-site scripting (XSS) vulnerabilities in Andy's PHP Knowledgebase (aphpkb) 0.57 allow remote attackers to inject arbitrary web script or HTML via the (1) keyword_list parameter to (a) index.php; (2) title, (3) article, (4) author, and (5) keywords parameters to (b) submit_article.php; and (6) Question, (7) Name, and (8) Email parameters to (c) submit_question.php.