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-2017-6770—Cisco IOS 12.0 through 15.6, Adaptive Security Appliance (ASA) Software 7.0.1 through 9.7.1.2, NX-OS 4.0 through 12.0, and IOS XE 3.6 througEPSS 1.7%CVE-2026-25892HIGHAdminer has an Unauthenticated Persistent DoS via Array Injection in ?script=version EndpointEPSS 1.7%CVE-2020-15168LOWFile size limit bypass in node-fetchEPSS 1.7%CVE-2023-46289HIGHRockwell Automation FactoryTalk® View Site Edition Vulnerable to Improper Input ValidationEPSS 1.7%CVE-2023-35367CRITICALWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.7%CVE-2023-35366CRITICALWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.7%CVE-2026-40261HIGHComposer has Command Injection via Malicious Perforce ReferenceEPSS 1.7%CVE-2021-32970HIGHMoxa NPort IAW5000A-I/O Series Serial Device Server Improper Input ValidationEPSS 1.7%CVE-2022-20797MEDIUMCisco Secure Network Analytics Remote Code Execution VulnerabilityEPSS 1.7%CVE-2021-43762MEDIUMAdobe Experience Manager Unicode normalization leads to dispatcher bypassEPSS 1.7%CVE-2019-1787HIGHClam AntiVirus PDF Denial of Service VulnerabilityEPSS 1.7%CVE-2023-32321CRITICALCKAN remote code execution and private information access via crafted resource idsEPSS 1.7%CVE-2023-36897HIGHVisual Studio Tools for Office Runtime Spoofing VulnerabilityEPSS 1.7%CVE-2021-25435—Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using EPSS 1.7%CVE-2021-25434—Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using EPSS 1.7%CVE-2023-7163CRITICALD-Link D-View 8 Unauthenticated Probe-Core Server CommunicationEPSS 1.7%CVE-2022-24093CRITICALAdobe Commerce post-auth improper input validation leads to remote code executionEPSS 1.7%CVE-2025-34105CRITICALDiskBoss Enterprise Stack-Based Buffer Overflow RCEEPSS 1.7%CVE-2020-3516MEDIUMCisco IOS XE Software Web UI Improper Input Validation VulnerabilityEPSS 1.7%CVE-2018-19005—Cscape, Version 9.80.75.3 SP3 and prior. An improper input validation vulnerability has been identified that may be exploited by processing EPSS 1.7%