Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Versions of the package quill-mention before 4.0.0 is vulnerable to Cross-site Scripting (XSS) due to improper user-input sanitization, via the renderList function. Note: If the mentions list is sourced from unsafe (user-sourced) data, this might allow an injection attack when a Quill user hits @.