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prionPRIOn knowledge basePRION:CVE-2018-12395
HistoryFeb 28, 2019 - 6:29 p.m.

Design/Logic Flaw

2019-02-2818:29:00
PRIOn knowledge base
www.prio-n.com
7

7.6 High

AI Score

Confidence

High

0.016 Low

EPSS

Percentile

87.3%

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.