CVE-2021-43528
6.5
MEDIUM
CVSS 3.1
EPSS 0.85%
Description
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.
How to fix CVE-2021-43528
To remediate CVE-2021-43528, upgrade the affected package to a fixed version below.
- Debian/thunderbird—upgrade to 1:91.4.1-1~deb11u1 or later
Is CVE-2021-43528 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:91.4.1-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |