Incomplete Authorization in WhatsApp for iOS and Mac Linked Device Synchronization

CVE-2025-55177

What is CVE-2025-55177?

CVE-2025-55177 is a vulnerability identified in WhatsApp for iOS and Mac that relates to the synchronization of linked devices. Specifically, this vulnerability arises from incomplete authorization processes that could allow an unauthorized user to cause a target device to process messages from arbitrary URLs. This flaw affects versions of WhatsApp prior to v2.25.21.73 for iOS and v2.25.21.78 for both WhatsApp for iOS and WhatsApp for Mac. The potential exploitation of this vulnerability is concerning, as it could lead to unauthorized data access and manipulation, ultimately compromising user privacy and security on these platforms.

Potential impact of CVE-2025-55177

1. Unauthorized Data Access: Attackers could exploit this vulnerability to gain access to users' personal information or sensitive data through unauthorized URL processing, compromising user confidentiality.

2. Targeted Attacks: When leveraged in conjunction with specific OS-level vulnerabilities, such as CVE-2025-43300, CVE-2025-55177 could enable sophisticated attacks aimed at particular users, significantly raising the stakes for targeted individuals.

3. User Trust Erosion: Exploitations of this nature may lead to a loss of trust in the platform as users become aware of potential security flaws, thereby impacting user retention and overall reputation.

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