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-2018-12478MEDIUMobs-service-replace_using_package_version allows to specify arbitrary input filesEPSS 1.5%CVE-2022-26889HIGHPath Traversal in search parameter results in external content injectionEPSS 1.5%CVE-2025-30471HIGHA validation issue was addressed with improved logic. This issue is fixed in iOS 18.4 and iPadOS 18.4, iPadOS 17.7.6, macOS Sequoia 15.4, maEPSS 1.5%CVE-2018-1000037MEDIUMIn Artifex MuPDF 1.12.0 and earlier, multiple reachable assertions in the PDF parser allow an attacker to cause a denial of service (assert EPSS 1.5%CVE-2022-20745HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Interface Denial of Service VulnerabilityEPSS 1.5%CVE-2024-23263HIGHA logic issue was addressed with improved validation. This issue is fixed in Safari 17.4, iOS 16.7.6 and iPadOS 16.7.6, iOS 17.4 and iPadOS EPSS 1.5%CVE-2023-24856HIGHMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2020-3444MEDIUMCisco SD-WAN Software Packet Filtering Bypass VulnerabilityEPSS 1.5%CVE-2019-1789HIGHClamAV Denial of Service VulnerabilityEPSS 1.5%CVE-2019-1909MEDIUMCisco IOS XR Software Border Gateway Protocol Denial of Service VulnerabilityEPSS 1.5%CVE-2019-12701MEDIUMCisco Firepower Management Center Software File and Malware Policy Bypass VulnerabilityEPSS 1.5%CVE-2024-3096MEDIUMPHP function password_verify can erroneously return true when argument contains NULEPSS 1.5%CVE-2022-25885HIGHDenial of Service (DoS)EPSS 1.5%CVE-2019-1786HIGHClam AntiVirus PDF Out-of-Bounds Read VulnerabilityEPSS 1.5%CVE-2008-2173HIGHUnspecified vulnerability in Yamaha routers allows remote attackers to cause a denial of service (dropped session) via crafted BGP UPDATE meEPSS 1.5%CVE-2008-2169HIGHUnspecified vulnerability in Avici routers allows remote attackers to cause a denial of service (dropped session) via crafted BGP UPDATE mesEPSS 1.5%CVE-2020-15228LOWEnvironment Variable Injection in GitHub ActionsEPSS 1.5%CVE-2008-2170HIGHUnspecified vulnerability in Century routers allows remote attackers to cause a denial of service (dropped session) via crafted BGP UPDATE mEPSS 1.5%CVE-2023-25927MEDIUMIBM Security Verify Access denial of serviceEPSS 1.5%CVE-2019-1884HIGHCisco Web Security Appliance Web Proxy Denial of Service VulnerabilityEPSS 1.5%