CVE-2020-6815: Critical severity Mozilla Firefox vulnerability
Last updated 25 August 2025
Other sources
Mozilla developers Jason Kratzer, Boris Zbarsky, Tyson Smith, and Alexandru Michis reported memory safety and script safety bugs present in Firefox 73. Some of these bugs showed evidence of memory corruption or escalation of privilege and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Mozilla developers reported memory safety and script safety bugs present in Firefox 73. Some of these bugs showed evidence of memory corruption or escalation of privilege and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 74.
— Launchpad
Affected Software
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2020-6815?
The severity of CVE-2020-6815 is high.
What software is affected by CVE-2020-6815?
Mozilla Firefox versions up to exclusive 74 are affected by CVE-2020-6815.
Is there a fix available for CVE-2020-6815?
Yes, updating to Mozilla Firefox version 74 will fix CVE-2020-6815.
Where can I find more information about CVE-2020-6815?
You can find more information about CVE-2020-6815 on the Mozilla bug tracker and the Mozilla security advisories.