Remote Yes

Type Access restriction bypass

Description

The mozAddonManager in Firefox < 51 allows for the installation of extensions from the CDN for addons.mozilla.org, a publicly accessible site. This could allow malicious extensions to install additional extensions from the CDN in combination with an XSS attack on Mozilla AMO sites.

AVG-157 firefox 50.1.0-1 51.0.1-1 Critical Fixed

29 Jan 2017 ASA-201701-39 AVG-157 firefox Critical multiple issues

https://www.mozilla.org/en-US/security/advisories/mfsa2017-01/#CVE-2017-5393
https://bugzilla.mozilla.org/show_bug.cgi?id=1309282