CVE-2019-11747

The "Forget about this site" feature in the History pane is intended to remove all saved user data that indicates a user has visited a site

published September 27, 2019

CVSS
—
EPSS
1%
Percentile
67.7
In the wild
Unconfirmed
What it is

The "Forget about this site" feature in the History pane is intended to remove all saved user data that indicates a user has visited a site. This includes removing any HTTP Strict Transport Security (HSTS) settings received from sites that use it. Due to a bug, sites on the pre-load list also have their HSTS setting removed. On the next visit to that site if the user specifies an http: URL rather than secure https: they will not be protected by the pre-loaded HSTS setting. After that visit the site's HSTS setting will be restored. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01189 · 67.7th percentile
Published
2019-09-27T17:16Z
EPSS history
Timeline
  • 27 SEP 17:16Z
    The "Forget about this site" feature in the History pane is intended to remove all saved user data that indicates a user has visited a site
    cvelistv5