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-2024-3884HIGHUndertow: outofmemory when parsing form data encoding with application/x-www-form-urlencodedEPSS 1.5%CVE-2019-1951MEDIUMCisco SD-WAN Solution Packet Filtering Bypass VulnerabilityEPSS 1.5%CVE-2023-35303HIGHUSB Audio Class System Driver Remote Code Execution VulnerabilityEPSS 1.5%CVE-2022-32154MEDIUMRisky commands warnings in Splunk Enterprise DashboardsEPSS 1.5%CVE-2025-25005MEDIUMMicrosoft Exchange Server Tampering VulnerabilityEPSS 1.5%CVE-2022-24280MEDIUMApache Pulsar Proxy target broker address isn't validatedEPSS 1.5%CVE-2022-24774HIGHImproper Input Validation leading to Path Traversal in CycloneDX BOM Repository ServerEPSS 1.5%CVE-2023-49291CRITICALImproper Sanitization of Branch Name Leads to Arbitrary Code InjectionEPSS 1.4%CVE-2020-7839HIGHMarkAny MaEPSBroker Command Injection VulnerabilityEPSS 1.4%CVE-2021-1261HIGHCisco SD-WAN Command Injection VulnerabilitiesEPSS 1.4%CVE-2021-1260HIGHCisco SD-WAN Command Injection VulnerabilitiesEPSS 1.4%CVE-2026-77533CRITICALA malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi ProtEPSS 1.4%CVE-2026-77547CRITICALA malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi AcceEPSS 1.4%CVE-2026-77546CRITICALA malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi AcceEPSS 1.4%CVE-2026-77543CRITICALA malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi AcceEPSS 1.4%CVE-2026-77548CRITICALA malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi ProtEPSS 1.4%CVE-2017-7653—The Eclipse Mosquitto broker up to version 1.4.15 does not reject strings that are not valid UTF-8. A malicious client could cause other cliEPSS 1.4%CVE-2021-23862HIGHAuthenticated Remote Code ExecutionEPSS 1.4%CVE-2016-8647LOWAn input validation vulnerability was found in Ansible's mysql_user module before 2.2.1.0, which may fail to correctly change a password in EPSS 1.4%CVE-2025-34108HIGHDisk Pulse Enterprise 9.0.34 Login Stack Buffer OverflowEPSS 1.4%