What is CVE-2016-5279?

CVE-2016-5279 is a medium-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 4.3/10. Published 2016-09-22.

How severe is CVE-2016-5279?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Mozilla Firefox

CVE-2016-5279

Mozilla Firefox before 49.0 allows user-assisted remote attackers to obtain sensitive full-pathname information during a local-file drag-and-drop operation via crafted JavaScript code.

Vulnerability class: Information Disclosure

Published 2016-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.014 (71.2th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Mozilla Firefox

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

www.mozilla.org/security/announce/2016/mfsa2016-85.html (Vendor Advisory)
bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
www.securityfocus.com/bid/93052 (vdb-entry)
security.gentoo.org/glsa/201701-15 (vendor-advisory)
www.securitytracker.com/id/1036852 (vdb-entry)

Frequently asked questions

What is CVE-2016-5279?: CVE-2016-5279 is a medium-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 4.3/10. Published 2016-09-22.
How severe is CVE-2016-5279?: Medium severity. CVSS v3 base score is 4.3 out of 10.