CVE-2022-34473 Cross-site scripting in Firefox
An XSS vulnerability in Firefox's HTML Sanitizer allows attackers to execute arbitrary code via unsanitized xlink:href attributes in SVG use tags.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-34473?
CVE-2022-34473 is a medium-severity cross-site scripting vulnerability in Mozilla Firefox, published on 22 Dec 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The HTML Sanitizer should have sanitized the <code>href</code> attribute of SVG <code><use></code> tags; however it incorrectly did not sanitize <code>xlink:href</code> attributes. This vulnerability affects Firefox < 102.
Weakness: CWE-79
Which versions are affected by CVE-2022-34473?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2022-34473?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2022-34473 being exploited?
There is no known exploitation of CVE-2022-34473 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-h8wm-ccrj-94x5, UBUNTU-CVE-2022-34473.