What is CVE-2017-5417?

CVE-2017-5417 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-06-11.

How severe is CVE-2017-5417?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Mozilla Firefox

CVE-2017-5417

When dragging content from the primary browser pane to the addressbar on a malicious site, it is possible to change the addressbar so that the displayed location following navigation does not match the URL of the newly loaded page. This allows for spoofing attacks. This vulnerability affects Firefox < 52.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.8th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Mozilla Firefox — versions unspecified

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

bugzilla.mozilla.org/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
www.mozilla.org/security/advisories/mfsa2017-05/ (Vendor Advisory)
www.securitytracker.com/id/1037966 (VDB Entry, Third Party Advisory, vdb-entry)
www.securityfocus.com/bid/96692 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-5417?: CVE-2017-5417 is a medium-severity vulnerability in Mozilla Firefox, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2018-06-11.
How severe is CVE-2017-5417?: Medium severity. CVSS v3 base score is 5.3 out of 10.