CVE-2020-26973
High
Description
Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
SeverityHigh
CVSS8.8
Exploit probability76. percentile1.6%
Product
Mozilla Firefox
PublishedJan 7, 2021
First seenJan 7, 2021
How to fix
Update
- mozilla firefox84.0 or later
- mozilla firefox_esr78.6.0 or later
- mozilla thunderbird78.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 84.0 | 84.0 |
| mozilla firefox_esr | v < 78.6.0 | 78.6.0 |
| mozilla thunderbird | v < 78.6.0 | 78.6.0 |
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