CVE-2019-18426 | BDVDB-2026-129472 Detail

FacebookWhatsApp Desktop

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References#

Exploit#

No public exploit known

History#

Version 12020-01-21Record published in the CVE List.
Version 22025-10-21Most recent update recorded in the CVE List.

Published

Published: 2020-01-21
Last modified: 2025-10-21

Vendor information

Vendor: Facebook
Product: WhatsApp Desktop

All Facebook vulnerabilities

Score

8.2 High

EPSS

67.8%, High

Estimated chance of exploitation in the next 30 days. EPSS percentile: 99.3.

KEV

Yes

Listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

Action

Apply updates per vendor instructions.

Affected Systems

Vulnerable
0.3.9309
Fixed
Not stated
Vulnerable
< 0.3.9309
Fixed
0.3.9309

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.2 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	Required
Scope	Changed
Confidentiality	High
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).