CVE-2021-23995

When Responsive Design Mode was enabled, it used references to objects that were previously freed

published June 24, 2021

CVSS
—
EPSS
1%
Percentile
67.5
In the wild
Unconfirmed
What it is

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01181 · 67.5th percentile
Published
2021-06-24T13:26Z
EPSS history
Timeline
  • 24 JUN 13:26Z
    When Responsive Design Mode was enabled, it used references to objects that were previously freed
    cvelistv5