YCCMS 3.4 contains a stored cross-site scripting (XSS) vulnerability in the article management functionality. The vulnerability exists in the add() and getPost() functions within the ArticleAction.class.php file due to improper neutralization of user input in the article title field.
https://gist.github.com/b1uel0n3/8354650e683ffb0812bfe72b702b482d