The Seasar Foundation » Mayaa : Security Vulnerabilities, CVEs,

Cross-site scripting (XSS) vulnerability in Mayaa before 1.1.12 allows remote attackers to inject arbitrary web script or HTML in certain circumstances involving (1) lack of charset specification within a META element or (2) a META element that specifies an unrecognized charset, which trigger automatic character set recognition by the web browser, as demonstrated by improper handling of UTF-7 data.