CVE-2023-1720: BITRIX24

High severity, CVSS 8.0. EPSS: 0.9% chance of exploitation in the next 30 days.

Lack of mime type response header in Bitrix24 22.0.300 allows authenticated remote attackers to execute arbitrary JavaScript code in the victim's browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege, via uploading a crafted HTML file through /desktop_app/file.ajax.php?action=uploadfile.

Affected products

• BITRIX24 BITRIX24: version 22.0.300 only

Published 2023-11-01. Last modified 2026-06-17.