CVE-2026-104807 PUBLISHED

Mitel MiVoice Office 400 stored Cross-Site Scripting

Assigner: NCSC.ch
Reserved: 02.10.2026 Published: 05.10.2026 Updated: 05.10.2026

DigitalCanion has discovered a stored Cross-Site Scripting (XSS) vulnerability that allows an authenticated malicious user to inject persistent JavaScript or HTML content into the web application.

The specific flaw exists within the web portal listening on TCP port 443, under Configuration → Domains, specifically in the “Description” field. The application fails to properly validate or sanitize user-supplied input before storing and subsequently rendering the field.

By injecting malicious JavaScript into the Description field, an attacker can modify the content and behavior of the affected page when it is viewed by other users. This could allow an attacker to alter the page's appearance, display attacker-controlled content, or construct convincing phishing scenarios within the application's trusted web context.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/AU:Y/R:A/V:D/RE:L/U:Amber
CVSS Score: 1.9

Product Status

Vendor Mitel
Product Mitel MiVoice Office 400
Versions Default: unknown
  • Version 11.0.96.0 is affected

Credits

  • Brian Mariani from DigitalCanion SA finder

References

Problem Types

  • CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE

Impacts

  • CAPEC-63 Cross-Site Scripting (XSS)