Cascading Style Sheets (CSS), which are used to format and style web page layouts, are being utilized by malicious actors to get around spam filters and monitor user behavior.
According to recent research from Cisco Talos, a victim’s security and privacy may be jeopardized by such malevolent actions.
Even if certain elements linked to dynamic content (like JavaScript) are limited in email clients compared to web browsers, Talos researcher Omid Mirzaei stated in a paper released last week that the tools accessible in CSS allow attackers and spammers to follow users’ actions and preferences.
The information expands on the cybersecurity firm’s earlier findings of an increase in email threats using hidden text salting in the second part of the year read more about Cybercriminals Exploit CSS to Evade Spam Filters and Track Email Users’ Actions.
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