---
id: CVE-2026-27178
title: MajorDoMo Stored Cross-Site Scripting via Method Parameters to Shoutbox
summary: >-
  MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting
  (XSS) vulnerability through method parameter injection into the shoutbox. The
  /objects/?method= endpoint allows unauthenticated execution of stored methods
  with…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: sergejey
product: MajorDoMo
affected:
  - MajorDoMo <= *
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-02-20T19:02:11.510355Z'
published: '2026-02-18'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:01:41.247Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-27178'
references:
  - url: 'https://chocapikk.com/posts/2026/majordomo-revisited/'
    label: 'MajorDoMo Revisited: What I Missed in 2023'
  - url: 'https://github.com/sergejey/majordomo/pull/1177'
    label: 'Fix PR: sergejey/majordomo#1177'
  - url: >-
      https://www.vulncheck.com/advisories/majordomo-stored-cross-site-scripting-via-method-parameters-to-shoutbox
    label: >-
      VulnCheck Advisory: MajorDoMo Stored Cross-Site Scripting via Method
      Parameters to Shoutbox
tags:
  - cve.org
epss: 0.00265
epssPercentile: 0.18477
ingestedAt: '2026-11-08T14:51:22.465Z'
---

## Overview

MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability through method parameter injection into the shoutbox. The /objects/?method= endpoint allows unauthenticated execution of stored methods with attacker-controlled parameters. Default methods such as ThisComputer.VolumeLevelChanged pass the user-supplied VALUE parameter directly into the say() function, which stores the message raw in the shouts database table without escaping. The shoutbox widget renders stored messages without sanitization in both PHP rendering code and HTML templates. Because the dashboard widget auto-refreshes every 3 seconds, the injected script executes automatically when any administrator loads the dashboard, enabling session hijack through cookie exfiltration.

## Affected

- `MajorDoMo <= *`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.