CVE-2021-23961
thunderbird - security update
7.4
HIGH
CVSS 3.1
EPSS 0.50%
Description
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
How to fix CVE-2021-23961
To remediate CVE-2021-23961, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 78.10.0esr-1 or later
- —upgrade to 78.10.0esr-1~deb9u1 or later
- —upgrade to 78.10.0esr-1~deb10u1 or later
- —upgrade to 1:78.10.0-1 or later
- —upgrade to 1:78.10.0-1~deb9u1 or later
- —upgrade to 1:78.10.0-1~deb10u1 or later
Is CVE-2021-23961 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 78.10.0esr-1
- from 0, < 78.10.0esr-1~deb9u1
- from 0, < 78.10.0esr-1~deb10u1
- from 0, < 1:78.10.0-1
- from 0, < 1:78.10.0-1~deb9u1
- from 0, < 1:78.10.0-1~deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N |