CVE-2026-27175

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://chocapikk.com/posts/2026/majordomo-revisited/	Third Party Advisory Exploit
https://github.com/sergejey/majordomo/pull/1177	Issue Tracking Exploit
https://www.vulncheck.com/advisories/majordomo-command-injection-in-rcindexphp-via-race-condition	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mjdm:majordomo:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-02-18 22:16

Updated : 2026-02-20 20:02

NVD link : CVE-2026-27175

Mitre link : CVE-2026-27175

CVE.ORG link : CVE-2026-27175

JSON object : View

Products Affected

mjdm

majordomo

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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