CVE-2017-5420

Name: CVE-2017-5420
Creator: NVD / NIST
Published: 2018-06-11T21:29:05.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.29%

Last modified Jun 17, 2026

CVE-2017-5420 is a vulnerability of currently unknown severity. A "javascript:" url loaded by a malicious page can obfuscate its location by blanking the URL displayed in the addressbar, allowing for an attacker to spoof an existing page without the malicious page's address being displayed correctly. This vulnerability affects Firefox < 52.. EPSS estimates a 1.29% chance of exploitation in the next 30 days.

Description

A "javascript:" url loaded by a malicious page can obfuscate its location by blanking the URL displayed in the addressbar, allowing for an attacker to spoof an existing page without the malicious page's address being displayed correctly. This vulnerability affects Firefox < 52.

Metrics

EPSS Probability

1.29%

66.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 52.0

References

http://www.securityfocus.com/bid/96692Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037966Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1284395Exploit, Issue Tracking, Patch, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-05/Vendor Advisory
http://www.securityfocus.com/bid/96692Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037966Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1284395Exploit, Issue Tracking, Patch, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-05/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2017-5420?

How severe is CVE-2017-5420?

Severity scoring for CVE-2017-5420 is pending analysis. The EPSS model estimates a 1.29% probability of exploitation in the next 30 days.

How do I fix CVE-2017-5420?

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-2017-5420?

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

Scan your code now

Source: NVD / NIST