Cybercriminals Exploit CSS to Evade Spam Filters and Track Email Users' Actions

Malicious actors are exploiting Cascading Style Sheets (CSS), which are used to style and format the layout of web pages, to bypass spam filters and track users' actions. That's according to new findings from Cisco Talos, which said such malicious activities can compromise a victim's security and privacy. "The features available in CSS allow attackers and spammers to track users' actions and

source https://thehackernews.com/2025/03/cybercriminals-exploit-css-to-evade.html