CVE-2026-27178
Stored XSS in MajorDoMo Shoutbox Enables Admin Session Hijack
Publication date: 2026-02-18
Last updated on: 2026-02-20
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mjdm | majordomo | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
The vulnerability in MajorDoMo is a stored cross-site scripting (XSS) issue caused by method parameter injection into the shoutbox feature. An attacker can use the /objects/?method= endpoint to execute stored methods without authentication, injecting malicious scripts through user-controlled parameters. These scripts are stored raw in the database and rendered without sanitization in the dashboard's shoutbox widget, which auto-refreshes every 3 seconds. This allows the injected script to execute automatically when an administrator views the dashboard.
How can this vulnerability impact me? :
This vulnerability can lead to session hijacking by enabling attackers to steal administrator cookies through the injected scripts. Since the dashboard widget auto-refreshes frequently, the malicious script executes repeatedly, potentially compromising administrator accounts and allowing unauthorized access to the system.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know