Thunderbird unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did not receive chrome-level privileges, but could be used as a stepping stone to further an attack with other vulnerabilities. This vulnerability affects Thunderbird < 91.4.0.
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{ "binaries": [ { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "thunderbird" }, { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "thunderbird-dev" }, { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "thunderbird-gnome-support" }, { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "thunderbird-mozsymbols" }, { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "xul-ext-calendar-timezones" }, { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "xul-ext-gdata-provider" }, { "binary_version": "1:91.5.0+build1-0ubuntu0.20.04.1", "binary_name": "xul-ext-lightning" } ], "availability": "No subscription required" }