Verizon Call Filter App Vulnerability Exposed Call Records of Millions

Summary: A security vulnerability in the Verizon Call Filter iOS app put customers’ call history logs at risk by allowing unauthorized access. Attackers could retrieve call logs by modifying a phone number in a network request sent by the app. This failure to validate user information raises significant privacy and safety concerns, particularly for vulnerable individuals.

Affected: Verizon Wireless customers using the Call Filter app

Keypoints :

• Vulnerability enabled unauthorized access to call history logs of any Verizon number.
• The app sent requests without validating the authenticity of the phone number in the request.
• Concerns over privacy were highlighted for high-risk individuals such as abuse survivors and law enforcement.
• The flaw was linked to a server potentially owned by Cequint, raising questions about data security practices.
• Verizon confirmed that the vulnerability has been resolved.