Medium (5.3) in secreto31126 whatsapp-api-js. EPSS 14% chance of exploitation in the next 30 days. Fixed in whatsapp-api-js 4.0.3.
whatsapp-api-js is a TypeScript server agnostic Whatsapp's Official API framework. It's possible to check the payload validation using the WhatsAppAPI.verifyRequestSignature and expect false when the signature is valid. Incorrect Access Control, anyone using the post or verifyRequestSignature methods to handle messages is impacted. This vulnerability is fixed in 4.0.3.
Severity
CVSS 3.1
5.3 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
14% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-11-01)