CVE-2025-63406

HighPublic PoCRCE

Published: 13 November 2025

Published

13 November 2025

Modified

09 January 2026

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 0.0057 68.8th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-63406 is a high-severity Command Injection (CWE-77) vulnerability in Group-Office Group Office. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 31.2% 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 RA-5 (Vulnerability Monitoring and Scanning) and SI-10 (Information Input Validation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match

prevent

Directly mitigates the CVE by requiring timely patching of GroupOffice to versions 25.0.47 or 6.8.136, which fixes the unsafe eval() usage in FunctionField.php.

SI-10 Information Input Validation good match

prevent

Prevents arbitrary code execution by validating and sanitizing untrusted inputs to the dbToApi() method before they reach the eval() function, blocking command injection.

RA-5 Vulnerability Monitoring and Scanning good match

detect

Identifies the presence of CVE-2025-63406 in deployed GroupOffice instances through regular vulnerability scanning, enabling prompt remediation.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

Arbitrary code execution via command injection in a public-facing web application (GroupOffice) directly enables exploitation of public-facing applications.

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

NVD Description

An issue in Intermesh BV GroupOffice vulnerable before v.25.0.47 and 6.8.136 allows a remote attacker to execute arbitrary code via the dbToApi() and eval() in the FunctionField.php

Deeper analysisAI

CVE-2025-63406 is an arbitrary code execution vulnerability in Intermesh BV's GroupOffice, affecting versions prior to 25.0.47 and 6.8.136. The issue stems from improper use of the eval() function within the dbToApi() method in FunctionField.php, enabling command injection as classified under CWE-77. It 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), indicating high severity due to its potential for severe impact.

A remote attacker with low privileges, such as an authenticated user, can exploit this vulnerability over the network with low attack complexity and without requiring user interaction. Successful exploitation allows the attacker to execute arbitrary code on the affected server, compromising confidentiality, integrity, and availability with high impact.

Mitigation requires updating to GroupOffice version 25.0.47 or 6.8.136 or later. Additional resources include a proof-of-concept exploit at https://github.com/WinDyAlphA/CVE-2025-63406-PoC and analysis at https://noahheraud.com/posts/CVE-2025-63406/.