CVE-2019-11741 Cross-site scripting in Firefox
A compromised sandboxed process can execute Universal Cross-Site Scripting to modify Firefox configuration via privileged sites.
- 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-2019-11741?
CVE-2019-11741 is a medium-severity cross-site scripting vulnerability in Mozilla Firefox, published on 27 Sep 2019. 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
A compromised sandboxed content process can perform a Universal Cross-site Scripting (UXSS) attack on content from any site it can cause to be loaded in the same process. Because addons.mozilla.org and accounts.firefox.com have close ties to the Firefox product, malicious manipulation of these sites within the browser can potentially be used to modify a user's Firefox configuration. These two sites will now be isolated into their own process and not allowed to be loaded in a standard content process. This vulnerability affects Firefox < 69.
Weakness: CWE-79
Which versions are affected by CVE-2019-11741?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2019-11741?
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-2019-11741 being exploited?
There is no known exploitation of CVE-2019-11741 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-vj65-q8qp-f8ff, UBUNTU-CVE-2019-11741.