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CVE-2018-18495

6.5 · MEDIUM

WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions.

Published Feb 28, 2019CWE-732EPSS 1.93%

Overview

CVE-2018-18495 is a medium-severity vulnerability. It was published on February 28, 2019 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/106167Refbugzilla.mozilla.org/show_bug.cgi?id=1427585Refusn.ubuntu.com/3844-1/Refwww.mozilla.org/security/advisories/mfsa2018-29/Refwww.securityfocus.com/bid/106167Refbugzilla.mozilla.org/show_bug.cgi?id=1427585Refusn.ubuntu.com/3844-1/Refwww.mozilla.org/security/advisories/mfsa2018-29/

How CyberStrike helps

Frequently asked questions

What is CVE-2018-18495?

CVE-2018-18495 is a medium-severity vulnerability. It was published on February 28, 2019 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2018-18495?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-18495?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-18495?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-18495 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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