SQL injection vulnerability in func/login.php in MercuryBoard 1.1.5 and earlier allows remote attackers to execute arbitrary SQL commands via the User-Agent HTTP header ($_SERVER['HTTP_USER_AGENT']).
SQL injection vulnerability in post.php for MercuryBoard 1.1.1 allows remote attackers to execute arbitrary SQL commands via a reply post action for index.php with (1) the t parameter or (2) the qu parameter.
Cross-site scripting (XSS) vulnerability in MercuryBoard 1.0.x and 1.1.x allows remote attackers to inject arbitrary HTML and web script via the f parameter.
MercuryBoard 1.1.1 allows remote attackers to gain sensitive information via an HTTP request with the n parameter set to 0, which causes a divide-by-zero error and reveals the path in the resulting error message.
Multiple cross-site scripting (XSS) vulnerabilities in index.php in MercuryBoard 1.1.1 allow remote attackers to inject arbitrary web script or HTML via the (1) s, (2) l, (3) a, (4) t, (5) to, or (6) re parameters.