CVE-2021-47876

HIGH

GeoGebra Classic <5.0.631.0-d - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-47876. PoCs published by Brian Rodriguez.

AI-analyzed exploit summary This exploit generates a large buffer of 'A' characters to trigger a denial-of-service (DoS) in GeoGebra Classic 5.0.631.0-d by overwhelming the input field 'Entrada'. The PoC creates a payload file that, when pasted into the application, causes it to crash.

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.

Exploits (1)

exploitdb WORKING POC
by Brian Rodriguez · pythonlocalwindows
https://www.exploit-db.com/exploits/49654

This exploit generates a large buffer of 'A' characters to trigger a denial-of-service (DoS) in GeoGebra Classic 5.0.631.0-d by overwhelming the input field 'Entrada'. The PoC creates a payload file that, when pasted into the application, causes it to crash.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: GeoGebra Classic 5.0.631.0-d
No auth needed
Prerequisites: GeoGebra Classic 5.0.631.0-d installed on Windows · ability to run Python script to generate payload · access to the 'Entrada' input field in the application
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/49654
Various Sources product
https://www.geogebra.org

Scores

CVSS v3 7.5
EPSS 0.0024
EPSS Percentile 14.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (1)
GeoGebra/GeoGebra Classic 5.0.631.0
Published Jan 21, 2026
Tracked Since Feb 18, 2026