CVE-2025-61678Known exploitationPublic exploitNetwork attack vector

Authenticated code execution via unrestricted firmware upload

Published Oct 14, 2025 · Updated Oct 14, 2025

Arbitrary file upload in Endpoint Manager on FreePBX 16 before 16.0.92 and FreePBX 17 before 17.0.6 allows remote authenticated users to execute code. The firmware upload handler accepts dangerous file contents and uses the fwbrand parameter to alter the destination path, permitting placement of a PHP webshell in a web-served directory. A known username and a previously uploaded firmware file are required; successful placement grants code execution with the web server's privileges.

CVSS severity8.6
High
EPSS probability43.68%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Endpoint Manager on FreePBX 16 before 16.0.92 and FreePBX 17 before 17.0.6 allows remote authenticated users to execute code. The firmware upload handler accepts dangerous file contents and uses the fwbrand parameter to alter the destination path, permitting placement of a PHP webshell in a web-served directory. A known username and a previously uploaded firmware file are required; successful placement grants code execution with the web server's privileges.

The record

CVE
CVE-2025-61678
Published
Oct 14, 2025
Updated
Oct 14, 2025
Vendor
FreePBX
Product
Security Reporting
Classifications
CWE-434, T1505.003, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 16.0.92
  2. Affected versionversion=>= 17.0.0, < 17.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreePBX · Security Reportingversion=< 16.0.92; version=>= 17.0.0, < 17.0.6

Published CVSS scores

6.1FreePBXCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:L/U:Green
8.6FreePBXCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web Shell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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