Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Multiple cross-site scripting (XSS) vulnerabilities in Virtual War (aka VWar) 1.6.1 R2 allow remote attackers to inject arbitrary web script or HTML via (1) the Additional Information field to challenge.php, the (2) Additional Information or (3) Contact information field to joinus.php, (4) the War Report field to admin/admin.php in a finishwar action, or (5) the Nick field to profile.php.
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.