Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Vulnerable Product | Search on Vulmon | Subscribe to Product |
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mozilla firefox esr |
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mozilla thunderbird |
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mozilla firefox |
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debian debian linux 9.0 |
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debian debian linux 10.0 |
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debian debian linux 11.0 |