CVE-2025-55739
CVE-2025-55739 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.
Key facts
- Severity: Medium (CVSS 4.0 base score 5.1)
- EPSS exploit prediction: 0% (39th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-34015
- Weakness: CWE-522
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2025-55739?
- 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.
- How severe is CVE-2025-55739?
- CVE-2025-55739 has a CVSS 4.0 base score of 5.1, rated medium severity.
- Is CVE-2025-55739 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-55739?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-55739 have an EU (EUVD) identifier?
- Yes. CVE-2025-55739 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34015.
- When was CVE-2025-55739 published?
- CVE-2025-55739 was published on 2025-09-05 and last updated on 2026-06-17.
References
- https://github.com/FreePBX/api/commit/305295aad38322c74cffd75bf550707dfb1a64a2
- https://github.com/FreePBX/security-reporting/security/advisories/GHSA-3r47-p39v-vqqf
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