Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables. This could have been used to probe the browser history. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.
Published 2022-12-22 20:15:27
Updated 2022-12-30 22:13:04
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2022-29916

Probability of exploitation activity in the next 30 days: 0.12%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 45 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2022-29916

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
6.5
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
2.8
3.6
NIST

References for CVE-2022-29916

Products affected by CVE-2022-29916

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