CVE-2026-27177

7.2 HIGH
Published: February 18, 2026 Modified: February 20, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://chocapikk.com/posts/2026/majordomo-revisited/
Source: disclosure@vulncheck.com
Third Party Advisory Exploit
https://github.com/sergejey/majordomo/pull/1177
Source: disclosure@vulncheck.com
Issue Tracking Exploit

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.2 / 10.0
EPSS (Exploit Probability)
0.0%
7th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

mjdm