Vulnerability Details CVE-2026-4984
The Twilio integration webhook handler accepts any POST request without validating Twilio's 'X-Twilio-Signature'.
When processing media messages, it fetches user-controlled URLs ('MediaUrlN' parameters) using HTTP requests that include the integration's Twilio credentials in the 'Authorization' header.
An attacker can forge a webhook payload pointing to their own server and receive the victim's 'accountSID' and 'authToken' in plaintext (base64-encoded Basic Auth), leading to full compromise of the Twilio account.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 5.3%
CVSS Severity
CVSS v3 Score 8.2