First published: Tue Dec 07 2021(Updated: )
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.
Credit: security@mozilla.org security@mozilla.org
Affected Software | Affected Version | How to fix |
---|---|---|
debian/thunderbird | 1:91.12.0-1~deb10u1 1:115.3.1-1~deb10u1 1:102.13.1-1~deb11u1 1:115.3.1-1~deb11u1 1:102.15.1-1~deb12u1 1:115.3.1-1~deb12u1 1:115.3.1-1 | |
Mozilla Thunderbird | <91.4 | 91.4 |
Mozilla Thunderbird | <91.4.0 | |
Debian GNU/Linux | =9.0 | |
Debian GNU/Linux | =10.0 | |
Debian GNU/Linux | =11.0 |
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(Found alongside the following vulnerabilities)
CVE-2021-43528 is classified as a moderate severity vulnerability.
To fix CVE-2021-43528, upgrade Thunderbird to version 91.4 or later.
CVE-2021-43528 affects all versions of Thunderbird prior to 91.4.
No, CVE-2021-43528 does not allow for remote code execution, but it enables JavaScript in a limited context.
There are no known effective workarounds for CVE-2021-43528, so upgrading is recommended.