Cross-site scripting (XSS) vulnerability in user.php in e107 allows remote attackers to inject arbitrary web script or HTML via the (1) URL, (2) MSN, or (3) AIM fields.
chatbox.php in e107 0.554 and 0.603 allows remote attackers to cause a denial of service (pages fail to load) via HTML in the Name field, which prevents the main.php form from being loaded.