A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.
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:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade librewolfUpgrade firefox | Aug 22, 2024 | Mar 31, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | May 3, 2021 | Mar 31, 2021 |
| Mfsa2021 10 | — | Upgrade to Mozilla Firefox version 87.0Upgrade to the latest version of Mozilla Firefox | Mar 24, 2021 | Mar 23, 2021 |
| Ubuntu | — | Upgrade firefox | Mar 26, 2021 | Mar 25, 2021 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub