CVE-2019-18426

mediumpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.679 · 99 %ileexploit · PoCEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 2 exploits · PoC

Likely / severe?

67.9% (99th) EPSS

CVSS 5.8 · medium

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2022-05-23remediate by 2022-06-13

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

WhatsApp Cross-Site Scripting Vulnerability

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.

cvss

Technical severity, 0–10. One row per scoring source.

8.2

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.8–8.2

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 4.9

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 4.7

v3.18.2highAV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nsecondary · FSTEC (BDU) RU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nsecondary · ENISA EU

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:Nsecondaryexploitability 2.8 · impact 4.7

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimaryCWE-79US

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-48295WhatsApp Desktop 0.3.9308 - Persistent Cross-Site ScriptingPoC · exploit_db
HumanSecurity/CVE-2019-18426HumanSecurity/CVE-2019-18426PoC · poc_in_github

affected products (6)

Products and version ranges known to be affected.

Facebook WhatsApp Desktop≤ 0.3.9309enisa_euvdEU
Facebook WhatsApp Desktopunspecified → 0.3.9309enisa_euvdEU
Meta Platforms Inc WhatsApp≤ 2.20.10fstec_bduRU
Meta Platforms Inc WhatsApp Desktop≤ 0.3.9309fstec_bduRU
whatsapp whatsapp< 0.3.9309nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*
whatsapp whatsapp< 2.20.10nvdUScpe:2.3:a:whatsapp:whatsapp:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-01-21modified 2026-06-17

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+53006 more

references (9)

External citations — patches, advisories, analysis.

scry

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