High severity8.8NVD Advisory· Published Aug 26, 2020· Updated Jun 17, 2026
CVE-2020-12456
CVE-2020-12456
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.
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Affected products
3- cpe:2.3:a:mitel:mivoice_connect_client:*:*:*:*:*:*:*:*Range: <214.100.1223.0
- Mitel/MiVoice Connect Clientdescription
- Range: <214.100.1223.0
Patches
Vulnerability mechanics
References
2- www.mitel.com/support/security-advisoriesnvdVendor Advisory
- www.mitel.com/support/security-advisories/mitel-product-security-advisory-20-0006nvdVendor Advisory
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