CVE-2026-8209

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-09 · updated 2026-07-24
Weakness: CWE-23

Description

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

How to fix

Upgrade to a fixed version: gibbonedu gibbon 30.0.01. Check the vendor advisory for mitigations.

References

https://github.com/GibbonEdu/core/releases/tag/v30.0.01
https://projectblack.io/blog/gibbon-v30-authenticated-sql-injection-and-rce/#denial-of-service-via-path-traversal

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