Description
SVG's <code><use></code> element could have been used to load unexpected content that could have executed script in certain circumstances. While the specification seems to allow this, other browsers do not, and web developers relied on this property for script security so gecko's implementation was aligned with theirs. This vulnerability affects Firefox < 99.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 99 | 99 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | firefox | 1:1snap1-0ubuntu1 | — |
| Ubuntu 20.04 LTS | firefox | 99.0+build2-0ubuntu0.20.04.2 | USN-5370-1 |
| Ubuntu 18.04 LTS | firefox | 99.0+build2-0ubuntu0.18.04.2 | USN-5370-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 99.0-1.1 | openSUSE-SU-2024:11975-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | librewolf | 99.0-r0 | — |
| Alpine v3.23 | firefox +1 | 99.0-r0 | — |
| Alpine v3.22 | firefox +1 | 99.0-r0 | — |
| Alpine v3.21 | firefox +1 | 99.0-r0 | — |
| Alpine v3.20 | firefox | 99.0-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | firefox | 99.0-r0 | — |
| Alpine v3.18 | firefox | 99.0-r0 | — |
| Alpine v3.17 | firefox | 99.0-r0 | — |
| Alpine v3.16 | firefox | 99.0-r0 | — |
Advisories 5
- USN-5370-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:11975-1 MozillaFirefox-99.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-0482 Mozilla Firefox, Mozilla Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2025
- WID-SEC-2023-0838 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 3, 2023