The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame.
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame.
https://www.mozilla.org/security/advisories/mfsa2021-48/ https://bugzilla.mozilla.org/show_bug.cgi?id=1729517
Vulmon