Vulnerability Intelligence Report
WhatsApp Cross-Site Scripting Vulnerability
CVE-2019-18426
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
8.2
HIGH
Exploitability:2.9
Impact Score:4.8
EPSS Probability:67.86%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-79 ↗Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CWE-79)
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| WhatsApp Desktop | 0.3.9309 (affected), unspecified < 0.3.9309 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | |
| Reserved | 2019-10-25T00:00:00 |
| Published | 2020-01-21T20:30:15 |
| Last Updated | 2025-10-21T23:35:53 |
Community Chatter & Buzz