AEGLIX vulnerability intelligence
CVE-2024-39891
MEDIUM · CVSS 5.3 · Analyzed
Published: 2024-07-02 · Updated: 2026-06-17 · Source: NVD
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Vulnerability overview
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 and scoring
- CVSS score
- 5.3 · MEDIUM
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weaknesses
- CWE-203
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Twilio · Authy
- Added to catalog
- 2024-07-23
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA remediation due date
- 2024-08-13
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:a:twilio:authy:*:*:*:*:*:iphone_os:*:*
Before (exclusive): 26.1.0
cpe:2.3:a:twilio:authy_authenticator:*:*:*:*:*:android:*:*
Before (exclusive): 25.1.0
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://cwe.mitre.org/data/definitions/203.html
Technical Description
- https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/
Press/Media Coverage
- https://www.twilio.com/docs/usage/security/reporting-vulnerabilities
Product
- https://www.twilio.com/en-us/changelog
Release Notes
- https://cwe.mitre.org/data/definitions/203.html
Technical Description
- https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/
Press/Media Coverage
- https://www.twilio.com/docs/usage/security/reporting-vulnerabilities
Product
- https://www.twilio.com/en-us/changelog
Release Notes
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891
US Government Resource