{"id":"CVE-2021-47876","aliases":["EUVD-2026-3628","GHSA-fqhq-3xgh-rx7h"],"status":"published","title":"GeoGebra Classic 5.0.631.0-d - Denial of Service","description":"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.","severity":{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00283,"percentile":0.20989,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-770"],"published":"2026-01-21T17:27:49Z","modified":"2026-06-17T04:18:40Z","products":[{"vendor":"geogebra","product":"geogebra classic"}],"references":[{"url":"https://www.exploit-db.com/exploits/49654","tags":["exploit"]},{"url":"https://www.geogebra.org","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/geogebra-classic-d-denial-of-service","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-47876"},{"url":"https://github.com/advisories/GHSA-fqhq-3xgh-rx7h"}],"sources":{"cve":[{"id":"CVE-2021-47876","title":"GeoGebra Classic 5.0.631.0-d - Denial of Service","description":"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.","status":"published","published":"2026-01-21T17:27:49.817Z","modified":"2026-01-22T16:52:01.924Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:32:55.905855Z"}],"euvd":[{"id":"EUVD-2026-3628","description":"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.","status":"published","published":"2026-01-21T17:27:49Z","modified":"2026-01-22T16:52:01Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:48:48.575559Z"}],"ghsa":[{"id":"GHSA-fqhq-3xgh-rx7h","title":"GeoGebra Classic 5.0.631.0-d contains a denial of service vulnerability in the input field that...","description":"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.","status":"published","published":"2026-01-21T18:30:31Z","modified":"2026-01-21T18:30:39Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:05:50.792909Z"}],"nvd":[{"id":"CVE-2021-47876","description":"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.","status":"published","published":"2026-01-21T18:16:21.06Z","modified":"2026-06-17T04:18:40.593Z","cvss":[{"version":"4.0","score":6.7,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:07:09.005706Z"}]}}