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CVE-2026-27177

MajorDoMo Stored Cross-Site Scripting via Property Set Endpoint

Published: Feb 18, 2026Updated: Feb 20, 2026 Sources: CVE List NVDCWE-79
7.2HIGH
NVD MITRE
EPSS Score
0.2%
Top 90.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-79

Affected Products

mjdm
oss-project
majordomoOn-prem
Communications / email-server-client
sergejey
aka majordomo, sergejey majordomo
MajorDoMoOn-prem
Communications / email-server-client

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://chocapikk.com/posts/2026/majordomo-revisited/
chocapikk.com
https://github.com/sergejey/majordomo/pull/1177
github.com
https://www.vulncheck.com/advisories/majordomo-stored-cross-site-scripting-via-property-set-endpoint
vulncheck.com

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