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Mozilla Foundation Security Advisory 2006-47
Title: Native DOM methods can be hijacked across domains
Announced: July 25, 2006
Reporter: Thor Larholm
Products: Firefox, SeaMonkey
Fixed in: Firefox 126.96.36.199
A malicious page can hijack native DOM methods on a document object in another domain, which will run the attacker's script when called by the victim page. This could be used to steal login cookies, password, or other sensitive data on the target page, or to perform actions on behalf of a logged-in user.
Access checks on all other properties and document nodes are performed correctly. This cross-site scripting (XSS) attack is limited to pages which use standard DOM methods of the top-level document object, such as document.getElementById(). This includes many popular sites, especially the newer ones that offer rich interaction to the user.
This vulnerability was introduced during Firefox 1.5 development, it does not affect Firefox 1.0 or Mozilla Suite 1.7