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Microsoft Internet Explorer versions 5.5 and 6.0 are susceptible to 9 attacks involving object caching. When communicating between windows, security checks ensure that both pages are in the same security zone and on the same domain. These crucial security checks wrongly assume that certain methods and objects are only going to be called through their respective window. This assumption enables some cached methods and objects to provide interoperability between otherwise separated documents.

Microsoft Internet Explorer versions 5.5 and 6.0 are susceptible to 9 attacks involving object caching. When communicating between windows, security checks ensure that both pages are in the same security zone and on the same domain. These crucial security checks wrongly assume that certain methods and objects are only going to be called through their respective window. This assumption enables some cached methods and objects to provide interoperability between otherwise separated documents.