CVE-2019-18426
Cross-site Scripting: Is CVE-2019-18426 real, exploitable, or a false positive? Here's the community verdict.
signals
public sources
Confirmed exploited in the wild. Patch this first, regardless of the base score.
public exploits
links to sources — we don’t host codeA working exploit is publicly available from a maintained source. Treat this as higher urgency and verify your exposure.
baseline read
auto · not a community verdict
Real — exploited in the wild
CISA confirms active exploitation. Treat scanner hits as true positives unless your specific version or config is unaffected.
Based on CISA KEV
Confirm or dispute →CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
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.
References
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Field notes & remediation
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- 0
WhatsApp Cross-Site Scripting Vulnerability — A vulnerability in WhatsApp Desktop when paired with WhatsApp for iPhone allows cross-site scripting and local file reading. Listed in the CISA KEV catalog (added 2022-05-23) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~68%. Treat it as real and prioritize remediation over triage.
- 0
Required action for Meta Platforms WhatsApp: Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-06-13. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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