Input Validation / CSS Injection (Stored)
The risk associated with this vulnerability is that malicious users can inject arbitrary CSS code into a web page, which can be used to modify the style and layout of a web page, resulting in a wide range of attacks including defacement, phishing, and data exfiltration. The risk assessment of this vulnerability is critical, as it can result in a serious security breach.
The solution to this vulnerability is to ensure that user-supplied data is properly validated and encoded before being stored in a web page. Additionally, any user-supplied data should be encoded with HTML entities to prevent malicious code from being executed.