CVE-2026-30461

HighPublic PoCRCE

Published: 15 April 2026

Published

15 April 2026

Modified

20 April 2026

KEV Added

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Patch

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CVSS Score 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

EPSS Score 0.0038 59.5th percentile

Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-30461 is a high-severity Command Injection (CWE-77) vulnerability in Thedaylightstudio Fuel Cms. Its CVSS base score is 8.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 40.5% 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 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 remediates the command injection flaw (CWE-77) in FuelCMS v1.5.2's Installer.php add_git_submodule function through timely patching or updates.

SI-10 Information Input Validation good match

prevent

Prevents exploitation of the authenticated RCE by validating and sanitizing inputs to the vulnerable add_git_submodule function before command execution.

AC-6 Least Privilege partial match

prevent

Mitigates risk by restricting access to the sensitive Installer.php functions to only users requiring privilege for git submodule operations, blocking low-privilege (PR:L) exploitation.

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?

Authenticated RCE via command injection in a public-facing web application (FuelCMS Installer.php), directly enabling exploitation of public-facing applications.

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

NVD Description

Daylight Studio FuelCMS v1.5.2 was discovered to contain an authenticated remote code execution (RCE) vulnerability via the /controllers/Installer.php and the function add_git_submodule.

Deeper analysisAI

CVE-2026-30461 is an authenticated remote code execution (RCE) vulnerability in Daylight Studio FuelCMS version 1.5.2. The flaw exists in the /controllers/Installer.php component, specifically within the add_git_submodule function, and stems from CWE-77 (command injection). Published on 2026-04-15, it carries a CVSS v3.1 base score of 8.3 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L), reflecting its high severity due to network accessibility, low attack complexity, and significant impacts on confidentiality and integrity.

An attacker with low-privilege authenticated access (PR:L) can exploit the vulnerability remotely over the network without user interaction. By abusing the add_git_submodule function, the attacker achieves arbitrary code execution on the server, enabling high-level compromise of confidentiality and integrity, alongside limited availability disruption.

Mitigation guidance and further details are available in vendor resources at http://daylight.com and http://fuelcms.com, the affected source code at https://github.com/daylightstudio/FUEL-CMS/blob/master/fuel/modules/fuel/controllers/Installer.php, and the Pentest-Tools advisory PTT-2025-028 at https://pentest-tools.com/PTT-2025-028-Authenticated-RCE-via-Git-Submodules.pdf.