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.
Published 2021-12-08 22:15:10
Updated 2022-12-09 15:38:34
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-43542

0.39%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-43542

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
NIST
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

CWE ids for CVE-2021-43542

References for CVE-2021-43542

Products affected by CVE-2021-43542

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