CVE-2018-5166

Name: CVE-2018-5166
Creator: NVD / NIST
Published: 2018-06-11T21:29:15.64+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.43%

Last modified Jun 17, 2026

CVE-2018-5166 is a vulnerability of currently unknown severity. WebExtensions can use request redirection and a "filterReponseData" filter to bypass host permission settings to redirect network traffic and access content from a host for which they do not have explicit user permission. This vulnerability affects Firefox < 60.. EPSS estimates a 2.43% chance of exploitation in the next 30 days.

Description

WebExtensions can use request redirection and a "filterReponseData" filter to bypass host permission settings to redirect network traffic and access content from a host for which they do not have explicit user permission. This vulnerability affects Firefox < 60.

Metrics

EPSS Probability

2.43%

82.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

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=1437325Issue 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=1437325Issue 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-2018-5166?

How severe is CVE-2018-5166?

Severity scoring for CVE-2018-5166 is pending analysis. The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5166?

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-2018-5166?

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

Scan your code now

Source: NVD / NIST