Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mjdm | Majordomo | - |
Related Weaknesses (CWE)
References
- https://chocapikk.com/posts/2026/majordomo-revisited/Third Party AdvisoryExploit
- https://github.com/sergejey/majordomo/pull/1177Issue TrackingExploit
- https://www.vulncheck.com/advisories/majordomo-stored-cross-site-scripting-via-pThird Party Advisory
FAQ
What is CVE-2026-27177?
CVE-2026-27177 is a vulnerability with a CVSS score of 7.2 (HIGH). 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. U...
How severe is CVE-2026-27177?
CVE-2026-27177 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27177?
Check the references section above for vendor advisories and patch information. Affected products include: Mjdm Majordomo.