threat-intel
CSS: The Hidden Threat Lurking in Your Inbox
Medium
Summary
Researchers have discovered that Cascading Style Sheets (CSS), traditionally used for website design, can be weaponized to steal sensitive data from webmail platforms. While not a new threat, the potential for CSS-based attacks is growing due to browser feature additions and a lack of adequate security measures by email vendors. Users are largely defenseless unless they possess advanced HTML/CSS knowledge, and vendors are not consistently addressing the issue.
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