CVE-2017-7816

Public Exploit

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.31%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
http://www.securitytracker.com/id/1039465 vdb entry third party advisory
https://www.mozilla.org/security/advisories/mfsa2017-21/ vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1380597 issue tracking exploit
http://www.securityfocus.com/bid/101057 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-7816?
CVE-2017-7816 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7816?
To fix CVE-2017-7816, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7816 being actively exploited in the wild?
It is possible that CVE-2017-7816 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7816?
CVE-2017-7816 affects Mozilla Firefox.
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