{"id":"CVE-2019-18426","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-18426","generatedAt":"2026-10-28T06:35:04.604Z","title":"WhatsApp Cross-Site Scripting Vulnerability","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.","published":"2020-01-21T21:15:16.000Z","lastModified":"2026-06-17T02:25:01.000Z","status":"Analyzed","sourceIdentifier":"cve-assign@fb.com","cvss":{"version":"3.1","score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N"},"cwe":["CWE-79"],"affected":["whatsapp/whatsapp"],"epss":{"score":0.67859,"percentile":0.99316,"date":"2026-10-27","history":[]},"kev":{"listed":true,"dateAdded":"2022-05-23","dueDate":"2022-06-13","knownRansomwareCampaignUse":"Unknown","notes":"Apply updates per vendor instructions.\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-18426"},"exploits":{"count":1,"verified":false,"firstPublished":"2020-04-06","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":48295,"kind":"exploit","title":"WhatsApp Desktop 0.3.9308 - Persistent Cross-Site Scripting","url":"https://www.exploit-db.com/exploits/48295","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/webapps/48295.txt","file":"exploits/multiple/webapps/48295.txt","published":"2020-04-06","added":"2020-04-06","updated":"2020-04-06","author":"Gal Weizman","type":"webapps","platform":"multiple","port":null,"verified":false,"codes":["CVE-2019-18426"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 13 June 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[],"references":[{"url":"http://packetstormsecurity.com/files/157097/WhatsApp-Desktop-0.3.9308-Cross-Site-Scripting.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2019-18426","tags":["Vendor Advisory"],"source":"cve-assign@fb.com"},{"url":"http://packetstormsecurity.com/files/157097/WhatsApp-Desktop-0.3.9308-Cross-Site-Scripting.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.facebook.com/security/advisories/cve-2019-18426","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18426","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-18426","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}