Weaknesses of type CWE-20

5,454 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-2019-1944MEDIUMCisco Adaptive Security Appliance Smart Tunnel VulnerabilitiesEPSS 0.3%CVE-2024-23482HIGHZScalerService Local Privilege EscalationEPSS 0.3%CVE-2020-15293MEDIUMMemory corruption in Bitdefender Hypervisor Introspection (VA-9336)EPSS 0.3%CVE-2026-20685MEDIUMAn attacker in a privileged network position may be able to leak sensitive information. A path handling issue was addressed with improved vaEPSS 0.3%CVE-2021-46767MEDIUMInsufficient input validation in the ASP may allow an attacker with physical access, unauthorized write access to memory potentially leadingEPSS 0.3%CVE-2022-21181HIGHImproper input validation for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a privileged user to potentially enaEPSS 0.3%CVE-2020-15292MEDIUMLack of validation on data read from guest memory in Bitdefender HVI (VA-9333)EPSS 0.3%CVE-2026-17929MEDIUMInsufficient validation of untrusted input in DevTools in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass navigatioEPSS 0.3%CVE-2026-18014MEDIUMInsufficient validation of untrusted input in DevTools in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass navigatioEPSS 0.3%CVE-2026-100370MEDIUMDOMSanitizer - Incomplete data: URL Sanitization in DOMSanitizer::isDangerousUrl() Allows Base64-Encoded Payloads to Bypass href and xlink:href ValidationEPSS 0.3%CVE-2025-8414CRITICALZigbee Green Power Host Buffer Overflow VulnerabilityEPSS 0.3%CVE-2026-17789MEDIUMInsufficient validation of untrusted input in Chrome for iOS in Google Chrome on iOS prior to 151.0.7922.72 allowed a remote attacker to bypEPSS 0.3%CVE-2026-84357MEDIUMImproper input validation in Omnibox in Google Chrome prior to 152.0.7977.75 allowed a remote attacker leveraging social engineering to bypaEPSS 0.3%CVE-2026-62998MEDIUMREDAXO: Unwhitelisted ORDER BY Column in rex_list Allows Authenticated Column EnumerationEPSS 0.3%CVE-2021-3452MEDIUMA potential vulnerability in the system shutdown SMI callback function in some ThinkPad models may allow an attacker with local access and eEPSS 0.3%CVE-2026-76816LOWNetty: MQTT Topic Name and Client ID Validation BypassEPSS 0.3%CVE-2023-5275LOWImproper Input Validation vulnerability in simulation function of GX Works2 allows an attacker to cause a denial-of-service (DoS) condition EPSS 0.3%CVE-2021-34756MEDIUMCisco Firepower Threat Defense Software Command Injection VulnerabilitiesEPSS 0.3%CVE-2023-5274LOWImproper Input Validation vulnerability in simulation function of GX Works2 allows an attacker to cause a denial-of-service (DoS) condition EPSS 0.3%CVE-2026-17909MEDIUMInsufficient validation of untrusted input in Isolated Web Apps in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak crEPSS 0.3%