CVE-2020-26979 Open redirect in Firefox
Attackers can redirect users to malicious sites by capturing address bar input before navigation, potentially enabling phishing or spoofing attacks.
- 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-2020-26979?
CVE-2020-26979 is a medium-severity vulnerability in Mozilla Firefox, published on 7 Jan 2021. 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
When a user typed a URL in the address bar or the search bar and quickly hit the enter key, a website could sometimes capture that event and then redirect the user before navigation occurred to the desired, entered address. To construct a convincing spoof the attacker would have had to guess what the user was typing, perhaps by suggesting it. This vulnerability affects Firefox < 84.
Weakness: CWE-601
Which versions are affected by CVE-2020-26979?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2020-26979?
Upgrade to a fixed version.
Is CVE-2020-26979 being exploited?
There is no known exploitation of CVE-2020-26979 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-3c9h-j75v-3mr5, UBUNTU-CVE-2020-26979.