What is CVE-2018-9104?

CVE-2018-9104 is a medium-severity vulnerability in Mitel Mivoice Connect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-04-25.

How severe is CVE-2018-9104?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mitel Mivoice Connect

CVE-2018-9104

A vulnerability in the conferencing component of Mitel MiVoice Connect, versions R1707-PREM SP1 (21.84.5535.0) and earlier, and Mitel ST 14.2, versions GA27 (19.49.5200.0) and earlier, could allow an unauthenticated attacker to conduct a reflected cross-site scripting (XSS) attack due to insufficient validation for the api.php page. A successful exploit could allow an attacker to execute arbitrary scripts.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-04-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (63.8th percentile), scored 2026-11-01.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.010 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.mitel.com/mitel-product-security-advisory-18-0003 (Broken Link, Vendor Advisory)
www.mitel.com/sites/default/files/2018-Security-Bulletin-18-0003-001.pdf (Broken Link, Vendor Advisory)

Frequently asked questions

What is CVE-2018-9104?: CVE-2018-9104 is a medium-severity vulnerability in Mitel Mivoice Connect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-04-25.
How severe is CVE-2018-9104?: Medium severity. CVSS v3 base score is 6.1 out of 10.