CVE-2019-18893

Name: CVE-2019-18893
Creator: NVD / NIST
Published: 2020-01-13T17:15:11.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.77%

Last modified Jun 17, 2026

CVE-2019-18893 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 1.77% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.77%

75.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Avast	Secure Browser	77.1.1831.91
Avg	Secure Browser	77.0.1790.77
Video Downloader Project	Video Downloader	< 1.5

References

https://palant.de/2020/01/13/pwning-avast-secure-browser-for-fun-and-profit/Exploit, Third Party Advisory
https://palant.de/2020/01/13/pwning-avast-secure-browser-for-fun-and-profit/Exploit, Third Party Advisory

Timeline

Published: Jan 13, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18893?

How severe is CVE-2019-18893?

CVE-2019-18893 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.77% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18893?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18893?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST