Overview
Twilio Authy contains an information disclosure vulnerability in its API that allows an unauthenticated endpoint to accept a request containing a phone number and respond with information about whether the phone number was registered with Authy.
https://www.twilio.com/en-us/changelog/Security_Alert_Authy_App_Android_iOS; https://nvd.nist.gov/vuln/detail/CVE-2024-39891
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2024-39891 |
| Vendor / Product | Twilio — Authy |
| NVD Published | 2024-07-02 |
| NVD Last Modified | 2025-11-05 |
| CVSS 3.1 Score | 5.3 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| Severity | MEDIUM |
| CWE | CWE-203 |
| CISA KEV Added | 2024-07-23 |
| CISA KEV Deadline | 2024-08-13 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2024-08-13.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2024-07-23 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2024-08-13 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2024-39891 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |