Vulnerability: Domain Fronting Bypass in Firefox ESR < 60.3 and Firefox < 63

CVE-2018-12395 · MEDIUM Severity

AV:N/AC:L/AU:N/C:P/I:N/A:N

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.

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