CVE-2019-11701 Cross-site scripting in Firefox
The default webcal protocol handler in Firefox could load sites vulnerable to XSS, potentially allowing attackers to execute scripts or take over accounts.
- 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-2019-11701?
CVE-2019-11701 is a medium-severity cross-site scripting vulnerability in Mozilla Firefox, published on 23 Jul 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
The default webcal: protocol handler will load a web site vulnerable to cross-site scripting (XSS) attacks. This default was left in place as a legacy feature and has now been removed. *Note: this issue only affects users with an account on the vulnerable service. Other users are unaffected.*. This vulnerability affects Firefox < 67.
Weakness: CWE-79
Which versions are affected by CVE-2019-11701?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2019-11701?
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-2019-11701 being exploited?
There is no known exploitation of CVE-2019-11701 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-frqr-7x7p-q8jj, UBUNTU-CVE-2019-11701.