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CVE-2019-18426

Meta Platforms — WhatsApp Cross-Site Scripting Vulnerability

Meta Platforms · CWE-79 — Cross-site scripting · in CISA KEV since 2022-05-23

KEV since 2022 · listed over a yearCISA KEVActively Exploited
76

EVRS 76 of 100 Urgent

Patch This Cycle

Rank 672 of 2,960 tracked

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Why it scores 76

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.679.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

whatsapp: update to 0.3.9309 or later | whatsapp: update to 2.20.10 or later

Affected versions

  • whatsapp< 0.3.9309< 2.20.10

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 8.2 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.679 (99.32nd pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-06-13 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 8.2 (v3.1), assigned by facebook. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do