CVE-2021-27811: Qibosoft

High severity, CVSS 7.2. EPSS: 1.2% chance of exploitation in the next 30 days.

A code injection vulnerability has been discovered in the Upgrade function of QibosoftX1 v1.0. An attacker is able execute arbitrary PHP code via exploitation of client_upgrade_edition.php and Upgrade.php.

Affected products

• Qibosoft Qibosoft: version 1.0 only

Published 2021-05-21. Last modified 2026-06-17.