CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NCVE-2024-39891
Medium (5.3) in Twilio Authy. In CISA KEV since 2024-07-23. EPSS 1.7% chance of exploitation in the next 30 days.
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.)
Severity
- EPSS
- 1.7% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)
- CISA KEV
- listed 2024-07-23, due 2024-08-13
- CWE
- CWE-203
- Published
- Modified
- Record from
- the NVD, synced
Affected
- twilio:authy
- twilio:authy_authenticator
References
- https://cwe.mitre.org/data/definitions/203.html
- https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/
- https://www.twilio.com/docs/usage/security/reporting-vulnerabilities
- https://www.twilio.com/en-us/changelog
- https://cwe.mitre.org/data/definitions/203.html