CVE-2017-7816

Name: CVE-2017-7816
Creator: NVD / NIST
Published: 2018-06-11T21:29:10.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.28%

Last modified Jun 17, 2026

CVE-2017-7816 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.28% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.28%

66.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	<= 55.0.3

References

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

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7816?

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.

How severe is CVE-2017-7816?

Severity scoring for CVE-2017-7816 is pending analysis. The EPSS model estimates a 1.28% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7816?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-7816?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST