Weaknesses of type CWE-20

5,887 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-2024-24683MEDIUMApache Hop Engine: ID isn't escaped when generating HTMLEPSS 1.2%CVE-2026-81995CRITICALAdobe Experience Manager Forms JEE | Improper Input Validation (CWE-20)EPSS 1.2%CVE-2018-0135—A vulnerability in Cisco Unified Communications Manager could allow an authenticated, remote attacker to access sensitive information on an EPSS 1.2%CVE-2026-27953HIGHormar has a Pydantic Validation Bypass via Kwargs Injection in Model ConstructorEPSS 1.2%CVE-2022-44617HIGHA flaw was found in libXpm. When processing a file with width of 0 and a very large height, some parser functions will be called repeatedly EPSS 1.2%CVE-2022-22727—A CWE-20: Improper Input Validation vulnerability exists that could allow an unauthenticated attacker to view data, change settings, impact EPSS 1.2%CVE-2020-3238HIGHCisco IOx Application Framework Arbitrary File Creation VulnerabilityEPSS 1.2%CVE-2016-7073MEDIUMAn issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-EPSS 1.2%CVE-2022-25940HIGHDenial of Service (DoS)EPSS 1.2%CVE-2026-50328HIGHWindows Server Update Service (WSUS) Tampering VulnerabilityEPSS 1.2%CVE-2022-4904HIGHA flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possiEPSS 1.2%CVE-2021-31372HIGHJunos OS: J-Web allows a locally authenticated attacker to escalate their privileges to root.EPSS 1.2%CVE-2025-30355HIGHSynapse vulnerable to federation denial of service via malformed eventsEPSS 1.2%CVE-2020-3478HIGHCisco Enterprise NFV Infrastructure Software File Overwrite VulnerabilityEPSS 1.2%CVE-2016-7074MEDIUMAn issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-EPSS 1.2%CVE-2021-43588MEDIUMDell EMC Data Protection Central version 19.5 contains an Improper Input Validation Vulnerability. A remote unauthenticated attacker could pEPSS 1.2%CVE-2021-41114MEDIUMHTTP Host Header Injection in Request Handling in Typo3EPSS 1.2%CVE-2024-45219HIGHApache CloudStack: Uploaded and registered templates and volumes can be used to abuse KVM-based infrastructureEPSS 1.2%CVE-2023-21685HIGHMicrosoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityEPSS 1.2%CVE-2026-54501CRITICALBrowsertrix: Arbitrary Command Injection due to Improper Command Sanitization in Git URLs specified as Custom BehaviorsEPSS 1.2%