CVE-2025-30004

HighPublic PoCRCE

Published: 31 March 2025

Published

31 March 2025

Modified

27 December 2025

KEV Added

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Patch

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CVSS Score 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.7058 98.7th percentile

Risk Priority 60 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-30004 is a high-severity OS Command Injection (CWE-78) vulnerability in Xorcom Completepbx. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 1.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly prevents command injection in the Task Scheduler by validating and sanitizing user inputs before processing.

SI-2 Flaw Remediation good match

prevent

Ensures timely patching of the specific command injection flaw, as addressed in CompletePBX version 5.2.36.1.

AC-6 Least Privilege partial match

prevent

Enforces least privilege on the Task Scheduler functionality to restrict escalation to root even if injection succeeds.

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation

Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.

attack.mitre.org →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

Command injection in admin Task Scheduler allows authenticated low-priv user to run arbitrary commands as root, directly enabling privilege escalation (T1068) and Unix shell command execution (T1059.004).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

NVD Description

Xorcom CompletePBX is vulnerable to command injection in the administrator Task Scheduler functionality, allowing for attackers to execute arbitrary commands as the root user. This issue affects CompletePBX: all versions up to and prior to 5.2.35

Deeper analysisAI

Xorcom CompletePBX, a PBX system, is affected by CVE-2025-30004, a command injection vulnerability in its administrator Task Scheduler functionality. This flaw, classified under CWE-78, enables attackers to execute arbitrary commands as the root user. The issue impacts all versions of CompletePBX up to and including 5.2.35 and carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

An authenticated attacker with low privileges, such as administrator access, can exploit this vulnerability remotely over the network with low complexity and no user interaction required. Successful exploitation grants root-level command execution on the system, resulting in high confidentiality, integrity, and availability impacts, potentially leading to full system compromise.

Advisories from VulnCheck detail the authenticated command injection mechanism, while Xorcom's release notes for CompletePBX version 5.2.36.1 indicate that this update addresses the vulnerability, recommending immediate upgrades to mitigate the risk.