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CVE-2020-12456

HIGH
8.8
CVSS Score
Published: August 26, 2020 at 06:07 PM UTC
Updated: June 17, 2026 at 02:51 AM UTC
1 product affected across 1 vendorMivoice Connect Client

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Severity
HIGH8.8
Exploit prediction
EPSS 3%

Description

A remote code execution vulnerability in Mitel MiVoice Connect Client before 214.100.1223.0 could allow an attacker to execute arbitrary code in the chat notification window, due to improper rendering of chat messages. A successful exploit could allow an attacker to steal session cookies, perform directory traversal, and execute arbitrary scripts in the context of the Connect client.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mivoice Connect Client· Mitel
95%
v < 214.100.1223.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMx_refsource_MISCVendor Advisory
Source: [email protected]
https://www.mitel.com/support/security-advisories
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-20-0006

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22

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