CVE-2022-28284

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-22 · updated 2026-06-17
Weakness: CWE-116

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

Mozilla Firefox: before 99.0 — fixed in 99.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 99.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1754522
https://www.mozilla.org/security/advisories/mfsa2022-13/
https://bugzilla.mozilla.org/show_bug.cgi?id=1754522
https://www.mozilla.org/security/advisories/mfsa2022-13/
https://bugzilla.mozilla.org/show_bug.cgi?id=1754522

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