CVE-2021-47876: Geogebra Classic

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

GeoGebra Classic 5.0.631.0-d contains a denial of service vulnerability in the input field that allows attackers to crash the application by sending oversized buffer content. Attackers can generate a large buffer of 800,000 repeated characters and paste it into the 'Entrada:' input field to trigger an application crash.

Affected products

• Geogebra Geogebra Classic: version 5.0.631.0 only

Published 2026-01-21. Last modified 2026-06-17.