CVE-2019-18893 Cross-site scripting in n/a
Cross-site scripting in the Video Downloader extension allows attackers to execute code and access sensitive user data like cookies and history.
- 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
- None listed
What is CVE-2019-18893?
CVE-2019-18893 is a medium-severity cross-site scripting vulnerability in n/a, published on 13 Jan 2020. 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
XSS in the Video Downloader component before 1.5 of Avast Secure Browser 77.1.1831.91 and AVG Secure Browser 77.0.1790.77 allows websites to execute their code in the context of this component. While Video Downloader is technically a browser extension, it is granted a very wide set of privileges and can for example access cookies and browsing history, spy on the user while they are surfing the web, and alter their surfing experience in almost arbitrary ways.
Weakness: CWE-79
Which versions are affected by CVE-2019-18893?
It affects 3 products.
Products include Avast Secure Browser, Avg Secure Browser, Video Downloader Project Video Downloader.
How do I fix CVE-2019-18893?
No fix has been published for CVE-2019-18893 yet. Limit exposure of the affected software until one is available.
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-2019-18893 being exploited?
There is no known exploitation of CVE-2019-18893 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-7r6v-j7mj-2949.