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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.

PUBLISHED Reserved 2026-02-18 | Published 2026-02-18 | Updated 2026-02-20 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unknown

Any version
affected

Credits

Valentin Lobstein finder

References

chocapikk.com/posts/2026/majordomo-revisited/ (MajorDoMo Revisited: What I Missed in 2023) third-party-advisory

github.com/sergejey/majordomo/pull/1177 (Fix PR: sergejey/majordomo#1177) patch

www.vulncheck.com/...ite-scripting-via-property-set-endpoint (VulnCheck Advisory: MajorDoMo Stored Cross-Site Scripting via Property Set Endpoint) third-party-advisory

cve.org (CVE-2026-27177)

nvd.nist.gov (CVE-2026-27177)

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