CVE-2017-7816

MEDIUM

Firefox < 56 - Privileged URL Access via WebExtension Popup

Title source: llm
STIX 2.1

Description

WebExtensions could use popups and panels in the extension UI to load an "about:" privileged URL, violating security checks that disallow this behavior. This vulnerability affects Firefox < 56.

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1039465
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2017-21/
Exploit, Issue Tracking x_refsource_confirm
https://bugzilla.mozilla.org/show_bug.cgi?id=1380597
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/101057

Scores

CVSS v3 5.3
EPSS 0.0027
EPSS Percentile 50.7%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Details

CWE
CWE-20
Status published
Products (1)
mozilla/firefox < 55.0.3
Published Jun 11, 2018
Tracked Since Feb 18, 2026