CVE-2024-39891: Twilio Authy Information Disclosure Vulnerability
In CISA’s Known Exploited Vulnerabilities catalog: Twilio Authy Information Disclosure Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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.)
Vector CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:N/S:U/UI:N
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
twilio: authy_2-factor_authentication
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- cwe.mitre.org/data/definitions/203.html (opens in new tab)
- www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phon… (opens in new tab)
- www.twilio.com/docs/usage/security/reporting-vulnerabilities (opens in new tab)
- www.twilio.com/en-us/changelog (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)