CVE-2021-23995
High
Description
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedJun 24, 2021
First seenJun 24, 2021
How to fix
Update
- mozilla firefox88.0 or later
- mozilla firefox_esr78.10 or later
- mozilla thunderbird78.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 88.0 | 88.0 |
| mozilla firefox_esr | v < 78.10 | 78.10 |
| mozilla thunderbird | v < 78.10 | 78.10 |
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