CVE-2025-29627 is a vulnerability identified in the KeeperChat iOS application version 5.8.8. This flaw allows a physically proximate attacker to escalate privileges by exploiting the Biometric Authentication Module. The vulnerability is classified under CWE-287, which relates to improper authentication. The CVSS v3.1 base score is 6.8, indicating a medium severity level. The vector string (CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) reveals that the attack requires physical proximity (Attack Vector: Physical), has low attack complexity, requires no privileges or user interaction, and impacts confidentiality, integrity, and availability to a high degree. Essentially, an attacker near the victim’s device can bypass biometric authentication controls, gaining unauthorized access with elevated privileges. This could allow the attacker to access sensitive communications, manipulate data, or disrupt application functionality. The absence of a patch or vendor project information suggests that remediation may not yet be available, increasing the urgency for risk mitigation. The vulnerability affects a widely used secure messaging app on iOS, which is often employed for confidential communications, making this a significant concern for users relying on biometric security for authentication.

For European organizations, especially those handling sensitive or regulated data, this vulnerability poses a substantial risk. KeeperChat is used for secure messaging, so exploitation could lead to unauthorized disclosure of confidential communications, potentially violating GDPR and other data protection regulations. The ability to escalate privileges without user interaction means attackers can stealthily compromise devices, leading to data breaches, espionage, or sabotage. Organizations in sectors such as finance, legal, healthcare, and government are particularly vulnerable due to the sensitive nature of their communications. The physical proximity requirement limits remote exploitation but does not eliminate risk in environments with shared or public spaces, such as offices, conferences, or transport hubs. The high impact on confidentiality, integrity, and availability could disrupt business operations and damage reputations. Additionally, the lack of known exploits in the wild currently provides a window for proactive defense, but the medium severity score and the nature of the vulnerability warrant immediate attention.

Given the physical proximity requirement and the biometric authentication bypass, European organizations should implement layered security controls. First, enforce strict physical security policies to limit unauthorized access to devices, including secure storage and use of device locks. Encourage users to disable biometric authentication on KeeperChat until a patch is available or to supplement it with strong passcodes. Monitor device usage and access logs for unusual activity indicative of privilege escalation attempts. Employ Mobile Device Management (MDM) solutions to enforce security policies, remotely wipe compromised devices, and control app permissions. Educate users about the risks of leaving devices unattended in public or semi-public spaces. Since no patch is currently available, organizations should liaise with KeeperChat developers for updates and consider alternative secure messaging solutions with robust authentication mechanisms. Finally, conduct regular security assessments and penetration testing focusing on mobile device vulnerabilities to identify and mitigate similar risks.