Weaknesses of type CWE-20

5,399 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-2021-21394MEDIUMDenial of service (via resource exhaustion) due to improper input validation on third-party identifier endpointsEPSS 1.5%CVE-2026-0933HIGHOS Command Injection in `wrangler pages deploy`EPSS 1.5%CVE-2024-21663CRITICALRemote code execution on ReconServer due to improper input sanitization on the prips commandEPSS 1.5%CVE-2023-24866MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2023-24865MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2019-1766HIGHCisco IP Phone 8800 Series File Upload Denial of Service VulnerabilityEPSS 1.5%CVE-2021-20206—An improper limitation of path name flaw was found in containernetworking/cni in versions before 0.8.1. When specifying the plugin to load iEPSS 1.5%CVE-2022-29169HIGHReDoS on endpoint html5client/useragent in BigBlueButtonEPSS 1.5%CVE-2023-31039CRITICALApache bRPC: ServerOptions.pid_file may cause arbitrary code executionEPSS 1.5%CVE-2022-23770HIGHWISA Smart Wing CMS Remote Command Execution VulnerabilityEPSS 1.5%CVE-2022-26336—A carefully crafted TNEF file can cause an out of memory exceptionEPSS 1.5%CVE-2021-1513HIGHCisco SD-WAN Software vDaemon Denial of Service VulnerabilityEPSS 1.5%CVE-2023-22886HIGHApache Airflow JDBC Provider: RCE VulnerabilityEPSS 1.5%CVE-2019-12633MEDIUMCisco Unified Contact Center Express Request Processing Server-Side Request Forgery VulnerabilityEPSS 1.5%CVE-2025-34055CRITICALAVTECH IP camera, DVR, and NVR Devices Authenticated Root Command ExecutionEPSS 1.5%CVE-2019-1884HIGHCisco Web Security Appliance Web Proxy Denial of Service VulnerabilityEPSS 1.5%CVE-2019-16027HIGHCisco IOS XR Software Intermediate System–to–Intermediate System Denial of Service VulnerabilityEPSS 1.5%CVE-2026-41042CRITICALApache Gravitino: Unauthenticated callers can supply a malicious H2 JDBC URL through the testConnection API, which executes arbitrary Java code on the server via H2's INIT parameterEPSS 1.5%CVE-2019-7617—When the Elastic APM agent for Python versions before 5.1.0 is run as a CGI script, there is a variable name clash flaw if a remote attackerEPSS 1.5%CVE-2022-36125HIGHInteger overflow when reading corrupted .avro file in Avro Rust SDKEPSS 1.5%