CVE-2018-5173

Name: CVE-2018-5173
Creator: NVD / NIST
Published: 2018-06-11T21:29:15.937+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.82%

Last modified Jun 17, 2026

CVE-2018-5173 is a vulnerability of currently unknown severity. The filename appearing in the "Downloads" panel improperly renders some Unicode characters, allowing for the file name to be spoofed. This can be used to obscure the file extension of potentially executable files from user view in the panel. EPSS estimates a 1.82% chance of exploitation in the next 30 days.

Description

The filename appearing in the "Downloads" panel improperly renders some Unicode characters, allowing for the file name to be spoofed. This can be used to obscure the file extension of potentially executable files from user view in the panel. Note: the dialog to open the file will show the full, correct filename and whether it is executable or not. This vulnerability affects Firefox < 60.

Metrics

EPSS Probability

1.82%

76.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Canonical	Ubuntu Linux	18.04
Mozilla	Firefox	< 60.0

References

http://www.securityfocus.com/bid/104139Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040896Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1438025Issue Tracking, Permissions Required, Vendor Advisory
https://usn.ubuntu.com/3645-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory
http://www.securityfocus.com/bid/104139Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040896Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1438025Issue Tracking, Permissions Required, Vendor Advisory
https://usn.ubuntu.com/3645-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2018-5173?

How severe is CVE-2018-5173?

Severity scoring for CVE-2018-5173 is pending analysis. The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5173?

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-2018-5173?

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

Scan your code now

Source: NVD / NIST