CVE-2021-23987
High
Description
Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Mozilla Firefox
PublishedMar 31, 2021
First seenMar 31, 2021
How to fix
Update
- mozilla firefox87.0 or later
- mozilla firefox_esr78.9 or later
- mozilla thunderbird78.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 87.0 | 87.0 |
| mozilla firefox_esr | v < 78.9 | 78.9 |
| mozilla thunderbird | v < 78.9 | 78.9 |
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