medium5.3Known exploited
CVE-2024-39891
Twilio Authy Information Disclosure Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2024-07-23. Federal due date: 2024-08-13.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Impact
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.)
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Twilio | Authy | before 26.1.0 |
| Twilio | Authy Authenticator | before 25.1.0 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- 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
- 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://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891