Improper Privilege Management Affecting thunderbird package, versions <1:91.4.0-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
1.27% (66th percentile)

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  • Snyk IDSNYK-ECHOLATEST-THUNDERBIRD-18319219
  • published26 Jul 2026
  • disclosed8 Dec 2021

Introduced: 8 Dec 2021

CVE-2021-43528  (opens in a new tab)
CWE-269  (opens in a new tab)

How to fix?

Upgrade Echo:latest thunderbird to version 1:91.4.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Thunderbird unexpectedly enabled JavaScript in the composition area. The JavaScript execution context was limited to this area and did not receive chrome-level privileges, but could be used as a stepping stone to further an attack with other vulnerabilities. This vulnerability affects Thunderbird < 91.4.0.

CVSS Base Scores

version 3.1