CVE-2025-29627 Overview
CVE-2025-29627 is an authentication weakness in the KeeperChat iOS application version 5.8.8. The flaw resides in the Biometric Authentication Module and allows a physically proximate attacker to escalate privileges on the device. The vulnerability is classified under [CWE-287] Improper Authentication and requires physical access to a target iPhone running the affected KeeperChat build.
Successful exploitation lets an attacker gain access to the messaging application without satisfying the biometric prompt. Because KeeperChat is designed to store private communications, bypassing the biometric gate exposes confidential message content, attachments, and account state.
Critical Impact
A physically proximate attacker can bypass the biometric gate in KeeperChat iOS 5.8.8 and access private messages, attachments, and account data.
Affected Products
- Keeper Security KeeperChat for iOS, version 5.8.8
- Deployments on Apple iPhone_OS where biometric authentication is the only gate to the app
- Environments where users rely on KeeperChat for confidential communications
Discovery Timeline
- 2025-06-09 - CVE-2025-29627 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-29627
Vulnerability Analysis
The issue is an improper authentication weakness in KeeperChat's Biometric Authentication Module on iOS. The module gates access to the application using Apple biometric APIs, but the implementation does not enforce a secure fail-closed state when the biometric check is not satisfied. An attacker with physical possession of an unlocked or targeted device can therefore reach the protected in-app content.
Because the attack vector is physical, exploitation requires direct handling of the device. However, no user interaction, credentials, or elevated privileges are required beyond that access. The confidentiality, integrity, and availability of data protected by the biometric prompt are all affected once the gate is bypassed.
Root Cause
The root cause is improper authentication [CWE-287] in the app's biometric gate. The Biometric Authentication Module does not correctly bind the success of the biometric check to the state transition that unlocks the protected UI and data. This design allows the authenticated state to be reached without the biometric assertion actually succeeding. Refer to the GitHub CVE Reference for CVE-2025-29627 for the researcher's technical write-up.
Attack Vector
Exploitation requires physical proximity to a device with KeeperChat 5.8.8 installed. The attacker interacts with the biometric prompt flow to reach the application's authenticated state without providing a valid biometric. Once inside, the attacker can read message threads, view attachments, and manipulate app data on behalf of the account holder. See the Keeper Chat Feature Overview for the data types exposed inside the app.
No verified proof-of-concept code is published. Technical details are documented in the referenced advisory.
Detection Methods for CVE-2025-29627
Indicators of Compromise
- Unexpected KeeperChat sessions on managed iOS devices, particularly on devices reported lost, stolen, or left unattended.
- Message activity or attachment access from a device without a corresponding successful biometric event in device logs.
- Configuration changes inside KeeperChat that do not align with the user's normal behavior pattern.
Detection Strategies
- Correlate mobile device management (MDM) telemetry with app usage records to identify KeeperChat access on devices flagged as unattended or physically compromised.
- Track KeeperChat application version inventory across the fleet and flag any endpoint still running version 5.8.8 on iOS.
- Monitor user reports of unauthorized message reads or account changes as a downstream signal of biometric bypass.
Monitoring Recommendations
- Enroll iOS devices in an MDM solution that reports installed app versions and device lock state.
- Alert when KeeperChat 5.8.8 remains installed after a fixed version is available from the vendor.
- Review device loss and theft reports against KeeperChat access logs to identify suspicious post-loss activity.
How to Mitigate CVE-2025-29627
Immediate Actions Required
- Upgrade KeeperChat on iOS to the latest vendor-supplied version above 5.8.8.
- Force affected users to sign out and re-authenticate to KeeperChat after upgrading.
- Rotate any credentials or secrets that were shared through KeeperChat on the affected device.
Patch Information
Refer to the Keeper Security homepage and the App Store listing for KeeperChat to obtain the current iOS release. Confirm the installed version is greater than 5.8.8 before restoring the app to production use. The GitHub CVE Reference for CVE-2025-29627 tracks vendor response details.
Workarounds
- Enforce a strong device passcode and enable Apple's automatic device lock to reduce the window for physical access.
- Restrict KeeperChat use to devices enrolled in MDM with lost-device wipe capability enabled.
- Advise users not to leave devices unlocked or unattended in shared spaces until the patched version is deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.