CVE-2025-55739: api: Shared OAuth Signing Key Between Different Instances
api is a module for FreePBX@, which is an open source GUI that controls and manages Asterisk© (PBX). In versions lower than 15.0.13, 16.0.2 through 16.0.14, 17.0.1 and 17.0.2, there is an identical OAuth private key used across multiple systems that installed the same FreePBX RPM or DEB package. An attacker with access to the shared OAuth private key could forge JWT tokens, bypass authentication, and potentially gain full access to both REST and GraphQL APIs. Systems with the "api" module enabled, configured and previously activated by an administrator for remote inbound connections may be affected. This issue is fixed in versions 15.0.13, 16.0.15 and 17.0.3.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-55739?
CVE-2025-55739 is considered a significant security vulnerability due to the exposure of an identical OAuth private key across multiple systems.
How do I fix CVE-2025-55739?
To mitigate CVE-2025-55739, upgrade to FreePBX versions 15.0.13, 16.0.14, or 17.0.2.
What versions of FreePBX are affected by CVE-2025-55739?
CVE-2025-55739 affects FreePBX versions lower than 15.0.13, and versions 16.0.2 to 16.0.14, as well as 17.0.1 and 17.0.2.
What impact does CVE-2025-55739 have on affected systems?
CVE-2025-55739 can lead to unauthorized access and potential compromise of multiple FreePBX systems using the same OAuth private key.
Is CVE-2025-55739 specific to a certain operating system?
CVE-2025-55739 is not specifically tied to an operating system, but rather to the FreePBX application itself across various installations.