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-2026-48384MEDIUMColdFusion | Improper Input Validation (CWE-20)EPSS 1.0%CVE-2021-39186MEDIUMImproper Input Validation in GlobalNewFilesEPSS 1.0%CVE-2025-47777CRITICAL5ire Client Vulnerable to Cross-Site Scripting (XSS) and Remote Code Execution (RCE)EPSS 1.0%CVE-2026-42579HIGHNetty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)EPSS 1.0%CVE-2020-8100CRITICALIncomplete validation in detection code in Bitdefender Engines (VA-8589)EPSS 1.0%CVE-2021-22800—A CWE-20: Improper Input Validation vulnerability exists that could cause a Denial of Service when a crafted packet is sent to the controlleEPSS 1.0%CVE-2018-25004MEDIUMInvariant failure when explaining a find with a UUIDEPSS 1.0%CVE-2022-21687MEDIUMCommand injection in gh-ostEPSS 1.0%CVE-2020-3568MEDIUMCisco Email Security Appliance URL Filtering Bypass VulnerabilityEPSS 1.0%CVE-2021-25378MEDIUMImproper access control of certain port in SmartThings prior to version 1.7.63.6 allows remote temporary denial of service.EPSS 1.0%CVE-2023-38704HIGHimport-in-the-middle allows unsanitized user controlled input in module generationEPSS 1.0%CVE-2021-41769—A vulnerability has been identified in SIPROTEC 5 6MD85 devices (CPU variant CP300) (All versions < V8.83), SIPROTEC 5 6MD86 devices (CPU vaEPSS 1.0%CVE-2020-15109MEDIUMAbility to change order address without triggering address validations in solidusEPSS 1.0%CVE-2021-26618HIGHTmax ToOffice arbitrary file creation vulnerabilityEPSS 1.0%CVE-2020-7866HIGHTobesoft XPLATFORM Arbitrary Command Execution VulnerabilityEPSS 1.0%CVE-2022-0484HIGHImproper URL Validation causes Mirantis Container Cloud Lens Extension to open external programsEPSS 1.0%CVE-2017-12228—A vulnerability in the Cisco Network Plug and Play application of Cisco IOS 12.4 through 15.6 and Cisco IOS XE 3.3 through 16.4 could allow EPSS 1.0%CVE-2019-16761MEDIUMValidator parsing discrepancy due to string encoding in NPM slp-validate 1.0.0EPSS 1.0%CVE-2022-39881MEDIUMImproper input validation vulnerability for processing SIB12 PDU in Exynos modems prior to SMR Sep-2022 Release allows remote attacker to reEPSS 1.0%CVE-2020-3205HIGHCisco IOS Software for Cisco Industrial Routers Virtual Device Server Inter-VM Channel Command Injection VulnerabilityEPSS 1.0%