Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
A cross-site scripting (XSS) vulnerability in the WSC plugin through 4.13.1 for CKEditor 4 allows remote attackers to run arbitrary web script inside an IFRAME element by injecting a crafted HTML element into the editor. This plugin has an End-of-Life date set to December 31st, 2021. This means it will not be supported any longer and may stop working after this date.
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.