EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Aug 9·5 min read
CSS: The bomb inside your inbox
TL;DR
Gareth Heyes reveals vulnerabilities in webmail clients that allow attackers to exploit CSS sanitization flaws, potentially leading to account takeovers and token theft. His research highlights the discrepancies between sanitizers and browser rendering, exposing significant security risks.
✦ Why It Matters
Review and strengthen your webmail client’s CSS sanitization processes to mitigate potential security risks.
Key Takeaways
- Investigate CSS sanitization methods in your webmail client.
- Implement stricter controls on HTML label tags in emails.
- Educate users about potential phishing via CSS exploits.
- Monitor for unusual account activity linked to webmail interactions.
How It Works
Attackers exploit discrepancies in CSS sanitization by using HTML label tags to manipulate UI actions, allowing them to control webmail interfaces. They can also use CSS pseudo-elements to hide malicious instructions from users while still being processed by AI systems, enabling indirect prompt injection.