Weaknesses of type CWE-20

5,888 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-2024-38105MEDIUMWindows Layer-2 Bridge Network Driver Denial of Service VulnerabilityEPSS 0.8%CVE-2023-33182NONENextcloud Contacts photos only sanitized if mime type is all lower caseEPSS 0.8%CVE-2023-0434MEDIUMImproper Input Validation in pyload/pyloadEPSS 0.8%CVE-2023-0100—In Eclipse BIRT, starting from version 2.6.2, the default configuration allowed to retrieve a report from the same host using an absolute HTEPSS 0.8%CVE-2025-10155CRITICALPickleScan Security Bypass Using Misleading File ExtensionEPSS 0.8%CVE-2026-24936CRITICALAn improper input validation vulnerability was found in ADM while joining a AD Domain.EPSS 0.8%CVE-2024-45117HIGHAdobe Commerce | Improper Input Validation (CWE-20)EPSS 0.8%CVE-2024-47823HIGHLivewire Remote Code Execution (RCE) on File UploadsEPSS 0.8%CVE-2024-21625HIGHOne-click remote code execution via malicious deep linkEPSS 0.8%CVE-2022-21197HIGHImproper input validation for some Intel(R) PROSet/Wireless WiFi products may allow an unauthenticated user to potentially enable denial of EPSS 0.8%CVE-2017-16005—Http-signature is a "Reference implementation of Joyent's HTTP Signature Scheme". In versions <=0.9.11, http-signature signs only the headerEPSS 0.8%CVE-2021-3048MEDIUMPAN-OS: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall OutageEPSS 0.8%CVE-2026-0848CRITICALArbitrary Code Execution in NLTK StanfordSegmenter via Untrusted JAR LoadingEPSS 0.8%CVE-2020-15234MEDIUMRedirect URL matching ignores character casingEPSS 0.8%CVE-2017-6794—A vulnerability in the CLI command-parsing code of Cisco Meeting Server could allow an authenticated, local attacker to perform command injeEPSS 0.8%CVE-2025-21194HIGHMicrosoft Surface Security Feature Bypass VulnerabilityEPSS 0.8%CVE-2021-22289HIGHRCE through Project Upload from TargetEPSS 0.8%CVE-2023-38495HIGHCrossplane vulnerable to possible image tampering from missing image validation for PackagesEPSS 0.8%CVE-2023-36762HIGHMicrosoft Word Remote Code Execution VulnerabilityEPSS 0.8%CVE-2024-3028HIGHImproper Input Validation in mintplex-labs/anything-llmEPSS 0.8%