Weaknesses of type CWE-20

5,847 results

Validação inadequada de entrada

O software recebe dados do usuário ou de fontes externas, mas não verifica ou verifica de forma incompleta se esses dados têm as propriedades necessárias para processar com segurança. Isso permite que entradas malformadas, maliciosas ou inesperadas passem por controles e causem comportamentos indevidos — desde crashes até injeção de código.

Example

Uma aplicação web recebe um parâmetro numérico via GET, mas não valida se é realmente um número inteiro válido antes de usá-lo em uma consulta SQL. Um atacante envia um valor com caracteres especiais (ex: `1' OR '1'='1`), conseguindo injetar código SQL direto no banco de dados.

How to mitigate

Implemente validação rigorosa na entrada: defina o tipo, formato, comprimento e intervalo esperados; rejeite tudo que não se encaixe. Use listas de caracteres permitidos ('whitelist'), escape de dados para o contexto específico (SQL, HTML, URL) e bibliotecas de validação consolidadas. Nunca confie em dados do cliente.

CVE-2026-33116HIGH.NET, .NET Framework, and Visual Studio Denial of Service VulnerabilityEPSS 2.1%CVE-2022-31778—Transfer-Encoding not treated as hop-by-hopEPSS 2.1%CVE-2020-28221—A CWE-20: Improper Input Validation vulnerability exists in EcoStruxure™ Operator Terminal Expert and Pro-face BLUE (version details in the EPSS 2.1%CVE-2019-1760MEDIUMCisco IOS XE Software Performance Routing Version 3 Denial of Service VulnerabilityEPSS 2.1%CVE-2022-31121HIGHImproper Input Validation in fabric hyperledgerEPSS 2.1%CVE-2017-12217—A vulnerability in the General Packet Radio Service (GPRS) Tunneling Protocol ingress packet handler of Cisco ASR 5500 System Architecture EEPSS 2.1%CVE-2017-12328—A vulnerability in Session Initiation Protocol (SIP) call handling in Cisco IP Phone 8800 Series devices could allow an unauthenticated, remEPSS 2.1%CVE-2019-18995MEDIUMABB PB610 HMISimulator does not check content-length of the HTTP requestEPSS 2.1%CVE-2021-28170—In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid EL expressions to be EPSS 2.1%CVE-2021-1404HIGHClam AntiVirus (ClamAV) Email Parser Denial of Service VulnerabilityEPSS 2.1%CVE-2025-21350MEDIUMWindows Kerberos Denial of Service VulnerabilityEPSS 2.1%CVE-2018-15416—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15414—Cisco Webex Network Recording Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15413—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15415—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15408—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15412—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15420—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2018-15417—Cisco Webex Network Recording Player and Cisco Webex Player Remote Code Execution VulnerabilitiesEPSS 2.1%CVE-2024-6089HIGHRockwell Automation Major nonrecoverable fault in 5015 – AENFTXTEPSS 2.1%