Ubuntu Security Notice 2550-1 - Olli Pettay and Boris Zbarsky discovered an issue during anchor navigations in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to bypass same-origin policy restrictions. Bobby Holley discovered that windows created to hold privileged UI content retained access to privileged internal methods if navigated to unprivileged content. An attacker could potentially exploit this in combination with another flaw, in order to execute arbitrary script in a privileged context. Various other issues were also addressed.
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