CVE-2017-7770

Name: CVE-2017-7770
Creator: NVD / NIST
Published: 2018-06-11T21:29:08.687+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.15%

Last modified Jun 17, 2026

CVE-2017-7770 is a vulnerability of currently unknown severity. A mechanism where when a new tab is loaded through JavaScript events, if fullscreen mode is then entered, the addressbar will not be rendered. This would allow a malicious site to displayed a spoofed addressbar, showing the location of an arbitrary website instead of the one loaded. EPSS estimates a 1.15% chance of exploitation in the next 30 days.

Description

A mechanism where when a new tab is loaded through JavaScript events, if fullscreen mode is then entered, the addressbar will not be rendered. This would allow a malicious site to displayed a spoofed addressbar, showing the location of an arbitrary website instead of the one loaded. Note: this issue only affects Firefox for Android. Desktop Firefox is unaffected. This vulnerability affects Firefox < 54.

Metrics

EPSS Probability

1.15%

62.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 54.0

References

http://www.securityfocus.com/bid/99049Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1317242Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/Vendor Advisory
http://www.securityfocus.com/bid/99049Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1317242Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2017-7770?

How severe is CVE-2017-7770?

Severity scoring for CVE-2017-7770 is pending analysis. The EPSS model estimates a 1.15% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7770?

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-2017-7770?

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

Scan your code now

Source: NVD / NIST