CVE-2018-18495

Name: CVE-2018-18495
Creator: NVD / NIST
Published: 2019-02-28T18:29:01.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.67%

Last modified Jun 17, 2026

CVE-2018-18495 is a vulnerability of currently unknown severity. WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. EPSS estimates a 1.67% chance of exploitation in the next 30 days.

Description

WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. This vulnerability affects Firefox < 64.

Metrics

EPSS Probability

1.67%

73.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 64.0
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	18.10

References

http://www.securityfocus.com/bid/106167Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1427585Issue Tracking, Permissions Required, Vendor Advisory
https://usn.ubuntu.com/3844-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-29/Vendor Advisory
http://www.securityfocus.com/bid/106167Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1427585Issue Tracking, Permissions Required, Vendor Advisory
https://usn.ubuntu.com/3844-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-29/Vendor Advisory

Timeline

Published: Feb 28, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18495?

How severe is CVE-2018-18495?

Severity scoring for CVE-2018-18495 is pending analysis. The EPSS model estimates a 1.67% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18495?

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-2018-18495?

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

Scan your code now

Source: NVD / NIST