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TI-2026-21619 Aliases CVE-2026-27177GHSA-c59q-pmw5-v3pf

MajorDoMo Stored Cross-Site Scripting via Property Set Endpoint

Priority LOW 29CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00229 13th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sergejeyMajorDoMoall versions—No fix listedCNA
  • MajorDoMo Vendorsergejey Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mjdm:majordomo:-:*:*:*:*:*:*:*not specified by NVDVulnerablesergejey
  • cpe:2.3:a:mjdm:majordomo:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·sergejey

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27177
  2. 2026-10-03 Alias added: GHSA-c59q-pmw5-v3pf

References

Exploit 2

  • TI-2026-21617 MajorDoMo Command Injection in rc/index.php via Race Condition CVSS 4.0CRITICAL 9.2
  • TI-2026-21616 MajorDoMo Unauthenticated Remote Code Execution via Admin Console Eval CVSS 4.0CRITICAL 9.3
  • TI-2026-21623 MajorDoMo Unauthenticated Module Uninstall via Market Endpoint CVSS 4.0HIGH 8.7
  • TI-2023-27813 MajorDoMo (aka Major Domestic Module) before 0662e5e allows command execution via… CVSS 3.1CRITICAL 9.8
  • TI-2026-21622 MajorDoMo Supply Chain Remote Code Execution via Update URL Poisoning CVSS 4.0CRITICAL 9.3
  • TI-2026-21621 MajorDoMo Unauthenticated SQL Injection in Commands Module CVSS 4.0HIGH 8.8
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences