Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Multiple cross-site scripting (XSS) vulnerabilities in PHPMyChat 0.14.5 allow remote attackers to inject arbitrary web script or HTML via the (1) LIMIT parameter to chat/deluser.php3, the (2) Link parameter to chat/edituser.php3, or the (3) LastCheck or (4) B parameter to chat/users_popupL.php3. NOTE: the FontName vectors for start_page.css.php3 and style.css.php3 are already covered by CVE-2005-1619. The medium vectors for start_page.css.php3 (start_page.css.php) and style.css.php3 (style.css.php), and the From vector for users_popupL.php3 (users_popupL.php), are already covered by CVE-2005-3991.
CWE-79 - Cross Site Scripting
Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.