CVE-2020-15654
Medium
Description
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mozilla Firefox
PublishedAug 10, 2020
First seenAug 10, 2020
How to fix
Update
- mozilla firefox79.0 or later
- mozilla firefox_esr78.1 or later
- mozilla thunderbird78.1 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 79.0 | 79.0 |
| mozilla firefox_esr | v < 78.1 | 78.1 |
| mozilla thunderbird | v < 78.1 | 78.1 |
| canonical ubuntu_linux | 16.04, 18.04, 20.04 | — |
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