CVE-2018-12395
7.5
HIGH
CVSS 3.1
EPSS 1.8%
Description
By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.
How to fix CVE-2018-12395
To remediate CVE-2018-12395, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 60.3.0esr-1 or later
Is CVE-2018-12395 being exploited?
Low — EPSS is 1.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 60.3.0esr-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |