Weaknesses of type CWE-20

5,888 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-2024-50305HIGHApache Traffic Server: Valid Host field value can cause crashesEPSS 0.9%CVE-2017-6649—A vulnerability in the CLI of Cisco NX-OS System Software 7.1 through 7.3 running on Cisco Nexus Series Switches could allow an authenticateEPSS 0.9%CVE-2026-71443HIGHCAI Content Credentials | Improper Input Validation (CWE-20)EPSS 0.9%CVE-2026-48352HIGHCAI Content Credentials | Improper Input Validation (CWE-20)EPSS 0.9%CVE-2021-38485HIGHEmerson WirelessHART GatewayEPSS 0.9%CVE-2026-50633HIGHApache CXF: JNDI Injection vulnerability in DispatchMDBMessageListenerImplEPSS 0.9%CVE-2025-43347CRITICALThis issue was addressed by removing the vulnerable code. This issue is fixed in iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26,EPSS 0.9%CVE-2022-47925HIGHInsufficient Input Validation in the Endpoint of the csaf-validator-serviceEPSS 0.9%CVE-2021-0278HIGHJunos OS: J-Web allows a locally authenticated attacker to escalate their privileges to root.EPSS 0.9%CVE-2024-38216HIGHAzure Stack Hub Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2022-47188HIGHImproper Input Validation in Generex CS141EPSS 0.9%CVE-2022-4504HIGHImproper Input Validation in openemr/openemrEPSS 0.9%CVE-2026-75686CRITICALAdobe Connect | Improper Input Validation (CWE-20)EPSS 0.9%CVE-2021-32666MEDIUMAsset DoS vulnerabilityEPSS 0.9%CVE-2022-23019—On BIG-IP version 16.1.x before 16.1.2, 15.1.x before 15.1.4.1, 14.1.x before 14.1.4.4, and all versions of 13.1.x and 12.1.x, when a messagEPSS 0.9%CVE-2023-35336MEDIUMWindows MSHTML Platform Security Feature Bypass VulnerabilityEPSS 0.9%CVE-2023-4698HIGHImproper Input Validation in usememos/memosEPSS 0.9%CVE-2026-106443HIGHWeasyPrint: EPS images reach the Ghostscript interpreter resulting in RCEEPSS 0.9%CVE-2022-40227HIGHA vulnerability has been identified in SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions < V17 Update 4), SIMATIC HMI KTP MobEPSS 0.9%CVE-2022-29479MEDIUMOn F5 BIG-IP 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 13.1.x versions prior to 13.1.5, and all versions of 12.1EPSS 0.9%