CVE-2022-31744 Cross-site scripting in Firefox
Attackers can inject CSS to bypass Content Security Policy in Firefox and Thunderbird, requiring users to update to patched versions.
- 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-2022-31744?
CVE-2022-31744 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
An attacker could have injected CSS into stylesheets accessible via internal URIs, such as resource:, and in doing so bypass a page's Content Security Policy. This vulnerability affects Firefox ESR < 91.11, Thunderbird < 102, Thunderbird < 91.11, and Firefox < 101.
Weakness: CWE-79
Which versions are affected by CVE-2022-31744?
It affects 3 products.
Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.
How do I fix CVE-2022-31744?
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-2022-31744 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-31744 exists.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2022-31744, GHSA-p5h8-cwcq-q5g2, UBUNTU-CVE-2022-31744.