CVE-2026-27175
Received Received - Intake
Unauthenticated OS Command Injection in MajorDoMo Leads to RCE

Publication date: 2026-02-18

Last updated on: 2026-02-20

Assigner: VulnCheck

Description
MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated OS command injection via rc/index.php. The $param variable from user input is interpolated into a command string within double quotes without sanitization via escapeshellarg(). The command is inserted into a database queue by safe_exec(), which performs no sanitization. The cycle_execs.php script, which is web-accessible without authentication, retrieves queued commands and passes them directly to exec(). An attacker can exploit a race condition by first triggering cycle_execs.php (which purges the queue and enters a polling loop), then injecting a malicious command via the rc endpoint while the worker is polling. The injected shell metacharacters expand inside double quotes, achieving remote code execution within one second.
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Meta Information
Published
2026-02-18
Last Modified
2026-02-20
Generated
2026-06-16
AI Q&A
2026-02-19
EPSS Evaluated
2026-06-15
NVD
CVE-2026-27175
EUVD
EUVD-2026-7930
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mjdm majordomo *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
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.
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Executive Summary

MajorDoMo (Major Domestic Module) has a vulnerability that allows unauthenticated attackers to execute operating system commands remotely. This happens because user input from the $param variable is inserted into a command string without proper sanitization. The command is stored in a database queue by a function that does not sanitize it, and a web-accessible script retrieves and executes these commands directly. An attacker can exploit a timing issue by triggering the command execution script and then injecting malicious commands while the script is polling, leading to remote code execution within one second.

Impact Analysis

This vulnerability can have severe impacts including unauthorized remote code execution on the affected system. An attacker can run arbitrary commands without authentication, potentially leading to full system compromise, data theft, service disruption, or further attacks within the network.

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