Security restrictions bypass in Mozilla Firefox - CVE-2017-7816

Vulnerability identifier: #VU8627

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2017-7816

CWE-ID: CWE-264

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Mozilla

Affected software:
Mozilla Firefox

The vulnerability allows a remote attacker to bypass certain security restrictions.

WebExtensions could use popups and panels in the extension UI to load an about: privileged URL, violating security checks that disallow this behavior.

Update to version 56.0.

• https://www.mozilla.org/en-US/security/advisories/mfsa2017-21/