What is CVE-2021-47876?

CVE-2021-47876 is a high-severity vulnerability in Geogebra Classic, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-21.

How severe is CVE-2021-47876?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Geogebra Classic

CVE-2021-47876

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.

EPSS: 0.002 (15.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Geogebra Classic — versions 5.0.631.0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47876?: CVE-2021-47876 is a high-severity vulnerability in Geogebra Classic, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-21.
How severe is CVE-2021-47876?: High severity. CVSS v3 base score is 7.5 out of 10.