Mozilla Foundation Security Advisory 2012-82
Title: top object and location property
accessible by plugins
Announced: October 9, 2012
Reporter: Mariusz Mlynski
Products: Firefox, Thunderbird, SeaMonkey
Fixed in: Firefox 16
Firefox ESR 10.0.8
Thunderbird ESR 10.0.8
Security researcher Mariusz Mlynski reported that the
location property can be accessed by binary plugins through
top can be shadowed by
Object.defineProperty as well. This can allow for possible
cross-site scripting (XSS) attacks through plugins.
In general these flaws cannot be exploited through email in the Thunderbird and SeaMonkey products because scripting is disabled, but are potentially a risk in browser or browser-like contexts in those products.