CVE-2017-7817

Name: CVE-2017-7817
Creator: NVD / NIST
Published: 2018-06-11T21:29:10.703+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.16%

Last modified Jun 17, 2026

CVE-2017-7817 is a vulnerability of currently unknown severity. A spoofing vulnerability can occur when a page switches to fullscreen mode without user notification, allowing a fake address bar to be displayed. This allows an attacker to spoof which page is actually loaded and in use. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

A spoofing vulnerability can occur when a page switches to fullscreen mode without user notification, allowing a fake address bar to be displayed. This allows an attacker to spoof which page is actually loaded and in use. Note: This attack only affects Firefox for Android. Other operating systems are not affected. This vulnerability affects Firefox < 56.

Metrics

EPSS Probability

1.16%

63.2th 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=1356596Exploit, 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=1356596Exploit, 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-2017-7817?

How severe is CVE-2017-7817?

Severity scoring for CVE-2017-7817 is pending analysis. The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7817?

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-2017-7817?

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

Scan your code now

Source: NVD / NIST