CVE-2018-12392: Critical severity Mozilla Thunderbird vulnerability
Last updated 25 August 2025
Other sources
When manipulating user events in nested loops while opening a document through script, it is possible to trigger a potentially exploitable crash due to poor event handling.
— Mozilla
Affected Software
Event History
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2018-12392?
CVE-2018-12392 has been classified as a high severity vulnerability due to its potential to cause exploitable crashes.
How do I fix CVE-2018-12392?
To fix CVE-2018-12392, update to the latest versions of Firefox ESR and Thunderbird above 60.3, or Firefox above 63.
Which software is affected by CVE-2018-12392?
CVE-2018-12392 affects Mozilla Firefox ESR versions up to 60.3, Mozilla Thunderbird up to 60.3, and Firefox up to version 63.
What type of vulnerability is CVE-2018-12392?
CVE-2018-12392 is a vulnerability related to poor event handling during the manipulation of user events in nested loops.
Can CVE-2018-12392 be exploited remotely?
Yes, CVE-2018-12392 can potentially be exploited remotely during scripts that open documents through user events.