Astra Linux – Vulnerability in Firefox and Thunderbird

Due to a layout change, the contents of iframes might be rendered outside of their borders. This could lead to user confusion or spoofing attacks. This vulnerability affects Thunderbird 91.8, Firefox 99, and Firefox ESR 91.8...

Mozilla: iframe contents could be rendered outside the border

The Mozilla Foundation Security Advisory describes this flaw as: Due to a layout change, iframe contents could have been rendered outside of its border. This could have led to user confusion or spoofing attacks...