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CVE-2025-67823: A vulnerability in the Multimedia Email component of Mitel MiContact Center Business through 10.2.0.10 and Mit

35
Routine
HIGH 8.2UPGRADEUPGRADE

CVE-2025-67823 is a high-severity flaw (CVSS 8.2) affecting cx, micontact center business. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the Multimedia Email component of Mitel MiContact Center Business through 10.2.0.10 and Mitel CX through 1.1.0.1 could allow an unauthenticated attacker to conduct a Cross-Site Scripting (XSS) attack due to insufficient input validation. A successful exploit requires user interaction where the email channel is enabled. This could allow an attacker to execute arbitrary scripts in the victim's browser or desktop client applicatio

Why this priority

  • High severity

A fixed release or distro patch exists.

Risk facts

CVSS score8.2 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance0.3% (top 74%)
CISA exploited listNo
WeaknessCWE-79
Published2026-01-15
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: mitel

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

mitel cx UPGRADE
Affected: < 2.0
Fixed in: 2.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy cx || rpm -q cx || cx --version
2. UPGRADE to 2.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade cx
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade cx
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
mitel micontact center business UPGRADE
Affected: < 10.2.0.11
Fixed in: 10.2.0.11
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy micontact-center-business || rpm -q micontact-center-business || micontact-center-business --version
2. UPGRADE to 10.2.0.11 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade micontact-center-business
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade micontact-center-business
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-67823?

cx: upgrade to 2.0; micontact center business: upgrade to 10.2.0.11. Exact commands for each OS are on this page.

Is CVE-2025-67823 being exploited?

CVE-2025-67823 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-67823 affect?

CVE-2025-67823 affects cx, micontact center business. Severity is high (CVSS 8.2). A vulnerability in the Multimedia Email component of Mitel MiContact Center Business through 10.2.0.10 and Mitel CX through 1.1.0.1 could allow an unauthenticated attacker to conduct a Cross-Site Scripting (XSS) attack due to insufficient i

How urgent is CVE-2025-67823?

Priority 35/100. High severity

References

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