A malicious website could have learned the size of a cross-origin resource that supported Range requests. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HMozilla Firefox
APPMozilla< 101Mozilla Firefox Esr
APPMozilla< 91.10Mozilla Thunderbird
APPMozilla< 91.10
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CHECK WITH VENDOR
No clear patch data available. Check vendor references.
References
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