CVE-2021-23973
6.5
MEDIUM
CVSS 3.1
EPSS 0.84%
Description
When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
How to fix CVE-2021-23973
To remediate CVE-2021-23973, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 78.8.0esr-1 or later
- —upgrade to 1:78.8.0-1 or later
Is CVE-2021-23973 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 78.8.0esr-1
- from 0, < 1:78.8.0-1
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:H/I:N/A:N |