Weaknesses of type CWE-20

5,357 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-2020-3191HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPv6 DNS Denial of Service VulnerabilityEPSS 1.8%CVE-2024-43611HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 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-2018-0355—A vulnerability in the web UI of Cisco Unified Communications Manager (Unified CM) could allow an unauthenticated, remote attacker to conducEPSS 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-2018-14631HIGHmoodle before versions 3.5.2, 3.4.5, 3.3.8 is vulnerable to a boost theme - blog search GET parameter insufficiently filtered. The breadcrumEPSS 1.8%CVE-2025-34056CRITICALAVTECH IP camera, DVR, and NVR Devices Authenticated Root Command ExecutionEPSS 1.8%CVE-2020-3228MEDIUMCisco IOS, IOS XE, and NX-OS Software Security Group Tag Exchange Protocol Denial of Service VulnerabilityEPSS 1.8%CVE-2019-1785CRITICALClam AntiVirus RAR Directory Traversal VulnerabilityEPSS 1.8%CVE-2021-44356HIGHMultiple 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-2021-44357HIGHMultiple 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-2021-44355HIGHMultiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reolink RLC-410W v3.0.0.136_20121EPSS 1.8%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-2021-44366HIGHMultiple 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-2021-44394HIGHMultiple 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-2021-44375HIGHMultiple 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-2021-1506CRITICALCisco SD-WAN vManage Software VulnerabilitiesEPSS 1.8%CVE-2020-3521MEDIUMCisco Data Center Network Manager Read File Path Traversal VulnerabilityEPSS 1.8%CVE-2021-36038MEDIUMMagento Commerce Multishipping Module Improper Input Validation Could Lead To Information ExposureEPSS 1.8%