Denial of Service Vulnerability in GeoGebra Graphing Calculator by GeoGebra
CVE-2021-47877

6.7MEDIUM

Key Information:

Vendor

Geogebra

Status
Geogebra Graphing Calculato‪r‬
Vendor
CVE Published:
21 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47877?

GeoGebra Graphing Calculator version 6.0.631.0 is susceptible to a denial of service vulnerability that can be exploited by attackers. By inputting an oversized buffer featuring 8000 repeated characters, an attacker can overwhelm the application’s input field, leading to application crashes and making it unresponsive. This poses a severe risk to users relying on the GeoGebra platform for mathematical operations and graphing needs.

Affected Version(s)

GeoGebra Graphing Calculato‪r‬ 6.0.631.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47877 - Proof of Concept

References

https://www.exploit-db.com/exploits/49653
exploit
https://www.geogebra.org
product
https://www.vulncheck.com/advisories/geogebra-graphing-ca...
third-party-advisory

CVSS V4

Score:
6.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Brian Rodriguez
JSON
.