When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | alpine-linux-upgrade-firefoxalpine-linux-upgrade-librewolf | Aug 22, 2024 | Dec 9, 2020 | |
| Arch Linux | arch-linux-upgrade-latest | Jul 11, 2025 | Dec 9, 2020 | |
| Mfsa2020 50 | mozilla-firefox-upgrade-83_0 | Nov 18, 2020 | Nov 17, 2020 | |
| Ubuntu | ubuntu-upgrade-firefox | Nov 19, 2020 | Nov 18, 2020 |
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