CVE-2021-23998
6.5
MEDIUM
CVSS 3.1
EPSS 0.16%
Description
Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
How to fix CVE-2021-23998
To remediate CVE-2021-23998, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 78.10.0esr-1 or later
- Debian/thunderbird—upgrade to 1:78.10.0-1 or later
Is CVE-2021-23998 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 78.10.0esr-1
- from 0, < 1:78.10.0-1
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 |