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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (18.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.000
Affected products
- Geogebra Classic — versions 5.0.631.0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/49654 (exploit)
- www.geogebra.org (product)
- www.vulncheck.com/advisories/geogebra-classic-d-denial-of-service (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.