CVE-2017-5450

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-06-11 · updated 2026-06-17
Weakness: CWE-20

Description

A mechanism to spoof the Firefox for Android addressbar using a "javascript:" URI. On Firefox for Android, the base domain is parsed incorrectly, making the resulting location less visibly a spoofed site and showing an incorrect domain in appended notifications. This vulnerability affects Firefox < 53.

Affected products

Mozilla Firefox: before 53.0 — fixed in 53.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 53.0. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/97940
http://www.securitytracker.com/id/1038320
https://bugzilla.mozilla.org/show_bug.cgi?id=1325955
https://www.mozilla.org/security/advisories/mfsa2017-10/
http://www.securityfocus.com/bid/97940
http://www.securitytracker.com/id/1038320
https://bugzilla.mozilla.org/show_bug.cgi?id=1325955
https://www.mozilla.org/security/advisories/mfsa2017-10/

Get alerted when CVE-2017-5450 or the next vulnerability affects your stack