CVE-2026-8209: Gibbonedu Gibbon

Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days.

Gibbon versions before v30.0.01 are affected by a path traversal vulnerability resulting in DOS by attempting extraction of web application PHP files, failed .zip extraction results in deletion of the file and a DOS condition. Successful exploitation requires Teacher or higher privileges. Exploitation could result in loss of availability of the web application.

Affected products

• Gibbonedu Gibbon: before 30.0.01 (fixed in 30.0.01)

Published 2026-05-09. Last modified 2026-07-24.