VDB-349252 · CVE-2026-28287 · GHSA-9vv6-h8v6-rp4q

FreePBX up to 16.0.19/17.0.4 Recordings os command injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in FreePBX up to 16.0.19/17.0.4. This affects an unknown part of the component Recordings Module. Executing a manipulation can lead to os command injection. This vulnerability is tracked as CVE-2026-28287. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in FreePBX up to 16.0.19/17.0.4. It has been declared as critical. This vulnerability affects an unknown functionality of the component Recordings Module. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

FreePBX is an open source IP PBX. From versions 16.0.17.2 to before 16.0.20 and from version 17.0.2.4 to before 17.0.5, multiple command injection vulnerabilities exist in the recordings module. This issue has been patched in versions 16.0.20 and 17.0.5.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-28287 since 02/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 16.0.20 or 17.0.5 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

FreePBX

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 7.2
VulDB Temp Score: 6.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreePBX 16.0.20/17.0.5

Timelineinfo

02/26/2026 CVE reserved
03/05/2026 +7 days Advisory disclosed
03/05/2026 +0 days VulDB entry created
03/07/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-9vv6-h8v6-rp4q
Status: Confirmed

CVE: CVE-2026-28287 (🔒)
GCVE (CVE): GCVE-0-2026-28287
GCVE (VulDB): GCVE-100-349252

Entryinfo

Created: 03/05/2026 20:49
Updated: 03/07/2026 23:35
Changes: 03/05/2026 20:49 (67), 03/07/2026 23:35 (11)
Complete: 🔍
Cache ID: 216::103