UBUNTU-CVE-2020-26950

In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox 82.0.3, Firefox ESR 78.4.1, and Thunderbird 78.4.2...

UBUNTU-CVE-2020-15648

Using object or embed tags, it was possible to frame other websites, even if they disallowed framing using the X-Frame-Options header. This vulnerability affects Thunderbird 78 and Firefox 78.0.2...