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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2025-0200
Authorization Bypass vulnerability in WhatsApp

Original Issue Date:August 31, 2025

Severity Rating: HIGH

Software Affected

  • WhatsApp for iOS version prior to 2.25.21.73
  • WhatsApp Business for iOS version 2.25.21.78
  • WhatsApp for Mac version 2.25.21.78

Overview

A vulnerability has been reported in WhatsApp, which could allow an attacker to bypass authorization on the targeted device.

Target Audience: 
End-users using affected version of WhatsApp.

Risk Assessment:
Risk of unauthorized access and sensitive information disclosure.

Impact Assessment:
Exploitation could allow disclosure of sensitive user information.

Description

WhatsApp is a widely used messaging application that enables users to send messages, voice notes, make calls, and share media over the internet with end-to-end encryption.

This vulnerability exists in WhatsApp due to improper authorization handling in linked device synchronization messages. An attacker could exploit this flaw to trigger processing of content from an arbitrary URL on a victim’s device.

In some cases, this vulnerability has been observed in combination with an OS-level flaw in Apple platforms (CVE-2025-43300) and may have been exploited in sophisticated, targeted attacks.

Solution

Users are advised to update to the latest available versions of WhatsApp:
https://www.whatsapp.com/security/advisories/2025/

Vendor Information

WhatsApp
https://www.whatsapp.com/security/advisories/2025/

References

WhatsApp
https://www.whatsapp.com/security/advisories/2025/

CVE Name
CVE-2025-55177

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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