SQL injection vulnerability in SSI.php in YaBB SE 1.5.4, 1.5.3, and possibly other versions before 1.5.5 allows remote attackers to execute arbitrary SQL commands via the ID_MEMBER parameter to the (1) recentTopics and (2) welcome functions.

Cross-site scripting (XSS) vulnerabilities in Yet Another Bulletin Board (YaBB) 1.5.0 allow remote attackers to execute arbitrary script as other users and possibly steal authentication information via cookies by injecting arbitrary HTML or script into (1) news_icon of news_template.php, and (2) threadid and subject of index.html