CVE-2024-39891

5.3 MEDIUM CISA KEV - Actively Exploited
Published: July 02, 2024 Modified: November 05, 2025

Description

In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://cwe.mitre.org/data/definitions/203.html
Source: cve@mitre.org
Technical Description
https://www.twilio.com/en-us/changelog
Source: cve@mitre.org
Release Notes
https://cwe.mitre.org/data/definitions/203.html
Source: af854a3a-2127-422b-91ae-364da2661108
Technical Description
https://www.twilio.com/docs/usage/security/reporting-vulnerabilities
Source: af854a3a-2127-422b-91ae-364da2661108
Product
https://www.twilio.com/en-us/changelog
Source: af854a3a-2127-422b-91ae-364da2661108
Release Notes
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

9 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.3 / 10.0
EPSS (Exploit Probability)
23.2%
96th percentile
Exploitation Status
Actively Exploited
Remediation due: 2024-08-13

Weaknesses (CWE)

Affected Vendors

twilio