CVE-2018-12395

By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting

published February 28, 2019

CVSS
—
EPSS
3%
Percentile
86.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02851 · 86.6th percentile
Published
2019-02-28T18:00Z
EPSS history
Timeline
  • 28 FEB 18:00Z
    By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting
    cvelistv5