MajorDoMo: Stored XSS Allows Malicious Code Injection

Summary

The MajorDoMo system has a security flaw that could allow an attacker to inject malicious code into the system. This could potentially allow an attacker to access sensitive information or take control of the system. Administrators should update the system to fix this issue as soon as possible to prevent any potential harm.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
mjdm	majordomo	All versions	–

Original title

MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability via the /objects/?op=set endpoint, which is intentionally unauthenticated for IoT device integration...

Original description

MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability via the /objects/?op=set endpoint, which is intentionally unauthenticated for IoT device integration. User-supplied property values are stored raw in the database without sanitization. When an administrator views the property editor in the admin panel, the stored values are rendered without escaping in both a paragraph tag (SOURCE field) and a textarea element (VALUE field). The XSS fires on page load without requiring any click from the admin. Additionally, the session cookie lacks the HttpOnly flag, enabling session hijack via document.cookie exfiltration. An attacker can enumerate properties via the unauthenticated /api.php/data/ endpoint and poison any property with malicious JavaScript.

nvd CVSS3.1 6.1

nvd CVSS4.0 5.3

Vulnerability type

CWE-79 Cross-site Scripting (XSS)

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-stored-cross-site-scripting-via-p... Third Party Advisory