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Privileges Required
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CVE-2021-43542

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Description

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

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General Information

Vendors

  • Mozilla

Products

  • Thunderbird,
  • Firefox ESR,
  • Firefox
Technical Analysis