vulnerability
MFSA2017-21 Firefox: Security vulnerabilities fixed in Firefox 56 (CVE-2017-7816)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:P/I:N/A:N) | Jun 11, 2018 | Jul 12, 2018 | Aug 11, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Jun 11, 2018
Added
Jul 12, 2018
Modified
Aug 11, 2025
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.
Solution
mozilla-firefox-upgrade-56_0
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.