{"id":"CVE-2025-55177","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-55177","generatedAt":"2026-10-31T06:58:52.987Z","title":"Meta Platforms WhatsApp Incorrect Authorization Vulnerability","description":"Incomplete authorization of linked device synchronization messages in WhatsApp for iOS prior to v2.25.21.73, WhatsApp Business for iOS v2.25.21.78, and WhatsApp for Mac v2.25.21.78 could have allowed an unrelated user to trigger processing of content from an arbitrary URL on a target’s device. We assess that this vulnerability, in combination with an OS-level vulnerability on Apple platforms (CVE-2025-43300), may have been exploited in a sophisticated attack against specific targeted users.","published":"2025-08-29T16:15:37.000Z","lastModified":"2026-10-18T21:10:00.000Z","status":"Analyzed","sourceIdentifier":"cve-assign@fb.com","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"cwe":["CWE-863"],"affected":["whatsapp/whatsapp","whatsapp/whatsapp business"],"epss":{"score":0.13513,"percentile":0.96445,"date":"2026-10-30","history":[{"date":"2026-10-25","score":0.13084,"percentile":0.96322}]},"kev":{"listed":true,"dateAdded":"2025-09-02","dueDate":"2025-09-23","knownRansomwareCampaignUse":"Unknown","notes":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.\nhttps://www.whatsapp.com/security/advisories/2025/ ; https://nvd.nist.gov/vuln/detail/CVE-2025-55177"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 23 September 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-25T00:00:00.000Z","detail":{"to":0.13084,"from":0.04734,"percentile":0.96322},"summary":"EPSS moved from 4.7% to 13.1% probability of exploitation in the next thirty days."}],"references":[{"url":"https://www.facebook.com/security/advisories/cve-2025-55177","tags":["Vendor Advisory"],"source":"cve-assign@fb.com"},{"url":"https://www.whatsapp.com/security/advisories/2025/","tags":["Vendor Advisory"],"source":"cve-assign@fb.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-55177","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-55177","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."}