What is the severity of CVE-2019-18426?

The severity of CVE-2019-18426 is high with a CVSS score of 8.2.

How do I fix CVE-2019-18426?

To fix CVE-2019-18426, update WhatsApp Desktop to version 0.3.9309 and WhatsApp for iPhone to version 2.20.10 or later.

Vulnerability/
CVE-2019-18426

Exploited

high

8.2

CWE

21/1/2020

7/2/2025

CVE-2019-18426: WhatsApp Cross-Site Scripting Vulnerability

Q: What is CVE-2019-18426?

CVE-2019-18426 is a cross-site scripting vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10.

First published: Tue Jan 21 2020(Updated: )

A vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10 allows cross-site scripting and local file reading. Exploiting the vulnerability requires the victim to click a link preview from a specially crafted text message.

Credit: cve-assign@fb.com cve-assign@fb.com

Affected Software	Affected Version	How to fix
WhatsApp
All of
WhatsApp	<2.20.10
WhatsApp	<0.3.9309

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Frequently Asked Questions

What is CVE-2019-18426?
CVE-2019-18426 is a cross-site scripting vulnerability in WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10.
How can the vulnerability be exploited?
Exploiting the vulnerability requires the victim to click a link preview from a specially crafted text message.
Who is affected by CVE-2019-18426?
WhatsApp Desktop versions prior to 0.3.9309 when paired with WhatsApp for iPhone versions prior to 2.20.10 are affected by this vulnerability.
What is the severity of CVE-2019-18426?
The severity of CVE-2019-18426 is high with a CVSS score of 8.2.
How do I fix CVE-2019-18426?
To fix CVE-2019-18426, update WhatsApp Desktop to version 0.3.9309 and WhatsApp for iPhone to version 2.20.10 or later.

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