Biometric Authentication Flaw in Signal App for Android Devices
CVE-2025-5715

1LOW

Key Information:

Vendor

Signal

Status
App
Vendor
CVE Published:
6 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5715?

A vulnerability has been identified in the Signal App version 7.41.4 for Android, specifically within the Biometric Authentication Handler component. This flaw permits attackers to exploit a missing critical step in the authentication process, potentially allowing unauthorized access to sensitive functions if the attacker gains physical access to the device. Although the complexity of successful exploitation is high, the exploit has been disclosed publicly, raising concerns about the security of users. Despite early notification of this issue, the vendor has yet to provide a response.

Affected Version(s)

App 7.41.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-5715 - Proof of Concept

References

https://vuldb.com/?id.311236
vdb-entry
https://vuldb.com/?ctiid.311236
signaturepermissions-required
https://vuldb.com/?submit.585069
third-party-advisory

CVSS V4

Score:
1
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Physical
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

S0lidstat3 (VulDB User)
.
CVE-2025-5715 : Biometric Authentication Flaw in Signal App for Android Devices