CVE-2018-12396

Description

A vulnerability where a WebExtension can run content scripts in disallowed contexts following navigation or other events. This allows for potential privilege escalation by the WebExtension on sites where content scripts should not be run. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.

Category

6.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.73% Top 30%
Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox ESR
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1483602 issue tracking vendor advisory broken link
https://www.debian.org/security/2018/dsa-4324 third party advisory vendor advisory
https://www.mozilla.org/security/advisories/mfsa2018-26/ vendor advisory
https://security.gentoo.org/glsa/201811-04 third party advisory vendor advisory
https://www.mozilla.org/security/advisories/mfsa2018-27/ vendor advisory
https://access.redhat.com/errata/RHSA-2018:3005 third party advisory vendor advisory
http://www.securityfocus.com/bid/105718 vdb entry third party advisory
https://access.redhat.com/errata/RHSA-2018:3006 third party advisory vendor advisory
https://usn.ubuntu.com/3801-1/ third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html third party advisory mailing list
http://www.securitytracker.com/id/1041944 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2018-12396?
CVE-2018-12396 has been scored as a medium severity vulnerability.
How to fix CVE-2018-12396?
To fix CVE-2018-12396, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-12396 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-12396 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-12396?
CVE-2018-12396 affects Mozilla Firefox ESR, Mozilla Firefox.
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