CVE-2018-12369: Critical severity Mozilla Firefox vulnerability
Last updated 25 August 2025
Other sources
WebExtensions bundled with embedded experiments were not correctly checked for proper authorization. This allowed a malicious WebExtension to gain full browser permissions.
Affected Software
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2018-12369?
CVE-2018-12369 is considered a high severity vulnerability due to its potential to allow full browser permissions to malicious WebExtensions.
How do I fix CVE-2018-12369?
To fix CVE-2018-12369, update your Mozilla Firefox to a version greater than 61 or Mozilla Firefox ESR to a version greater than 60.1.
Which software is affected by CVE-2018-12369?
CVE-2018-12369 affects Mozilla Firefox ESR versions up to 60.1 and Mozilla Firefox versions up to 61.
What type of vulnerability is CVE-2018-12369?
CVE-2018-12369 is an authorization bypass vulnerability related to the handling of bundled WebExtensions.
Can CVE-2018-12369 be exploited remotely?
Yes, CVE-2018-12369 can be exploited remotely by using malicious WebExtensions to gain unauthorized access to browser permissions.