Vulnerabilities
Vulnerable Software

Vulnerability Details 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. 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 56.9%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 4.3
Products affected by CVE-2019-11747


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