Microsoft Internet Explorer allows remote attackers to bypass cross-domain security restrictions and obtain sensitive information by using the @import directive to download files from other domains that are not valid Cascading Style Sheets (CSS) files, as demonstrated using Google Desktop, aka "CSSXSS" and "CSS Cross-Domain Information Disclosure Vulnerability."
- http://www.hacker.co.il/security/ie/css_import.html
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-021
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