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-2020-36195CRITICALSQL Injection Vulnerability in Multimedia Console and the Media Streaming Add-OnEPSS 1.8%CVE-2023-25692HIGHApache Airflow Google Provider: Google Cloud Sql Provider Denial Of ServiceEPSS 1.8%CVE-2020-3398HIGHCisco NX-OS Software Border Gateway Protocol Multicast VPN Session Denial of Service VulnerabilityEPSS 1.8%CVE-2019-12656HIGHCisco IOx Application Environment Denial of Service VulnerabilityEPSS 1.8%CVE-2026-44343CRITICALWGDashboard: Critical Vulnerability in 4.3.2EPSS 1.8%CVE-2022-35724—Denial of service while reading data in Avro Rust SDKEPSS 1.8%CVE-2021-21321CRITICALPrefix escapeEPSS 1.8%CVE-2019-1676MEDIUMCisco Meeting Server SIP Processing Denial of Service VulnerabilityEPSS 1.8%CVE-2020-3363HIGHCisco Small Business Smart and Managed Switches Denial of Service VulnerabilityEPSS 1.8%CVE-2024-43611HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.8%CVE-2025-24446CRITICALColdFusion | Improper Input Validation (CWE-20)EPSS 1.8%CVE-2021-3673—A vulnerability was found in Radare2 in version 5.3.1. Improper input validation when reading a crafted LE binary can lead to resource exhauEPSS 1.8%CVE-2020-3397HIGHCisco NX-OS Software Border Gateway Protocol Multicast VPN Denial of Service VulnerabilityEPSS 1.8%CVE-2020-3425HIGHCisco IOS XE Software Privilege Escalation VulnerabilitiesEPSS 1.8%CVE-2019-1785CRITICALClam AntiVirus RAR Directory Traversal VulnerabilityEPSS 1.8%CVE-2021-44357HIGHMultiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121EPSS 1.8%CVE-2021-44366HIGHMultiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121EPSS 1.8%CVE-2021-44354HIGHMultiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121EPSS 1.8%CVE-2021-44394HIGHMultiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121EPSS 1.8%CVE-2021-44355HIGHMultiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121EPSS 1.8%