CVE-2018-5152

Name: CVE-2018-5152
Creator: NVD / NIST
Published: 2018-06-11T21:29:15.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.65%

Last modified Jun 17, 2026

CVE-2018-5152 is a vulnerability of currently unknown severity. WebExtensions with the appropriate permissions can attach content scripts to Mozilla sites such as accounts.firefox.com and listen to network traffic to the site through the "webRequest" API. For example, this allows for the interception of username and an encrypted password during login to Firefox Accounts. EPSS estimates a 1.65% chance of exploitation in the next 30 days.

Description

WebExtensions with the appropriate permissions can attach content scripts to Mozilla sites such as accounts.firefox.com and listen to network traffic to the site through the "webRequest" API. For example, this allows for the interception of username and an encrypted password during login to Firefox Accounts. This issue does not expose synchronization traffic directly and is limited to the process of user login to the website and the data displayed to the user once logged in. This vulnerability affects Firefox < 60.

Metrics

EPSS Probability

1.65%

73.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-327

Affected Software

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

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=1415644Issue Tracking, Patch, Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1427289Issue Tracking, Permissions Required, Third Party 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=1415644Issue Tracking, Patch, Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1427289Issue Tracking, Permissions Required, Third Party 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-2018-5152?

How severe is CVE-2018-5152?

Severity scoring for CVE-2018-5152 is pending analysis. The EPSS model estimates a 1.65% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5152?

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-2018-5152?

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

Scan your code now

Source: NVD / NIST