Weaknesses of type CWE-20

5,416 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-2020-3501MEDIUMCisco Webex Meetings Desktop App Information Disclosure VulnerabilitiesEPSS 1.0%CVE-2020-3502MEDIUMCisco Webex Meetings Desktop App Information Disclosure VulnerabilitiesEPSS 1.0%CVE-2025-59248HIGHMicrosoft Exchange Server Spoofing VulnerabilityEPSS 1.0%CVE-2025-8769CRITICALMegaSys Computer Technologies Telenium Online Web Application Improper Input ValidationEPSS 1.0%CVE-2025-43234CRITICALMultiple memory corruption issues were addressed with improved input validation. This issue is fixed in iOS 18.6 and iPadOS 18.6, macOS SequEPSS 1.0%CVE-2022-45060HIGHAn HTTP Request Forgery issue was discovered in Varnish Cache 5.x and 6.x before 6.0.11, 7.x before 7.1.2, and 7.2.x before 7.2.1. An attackEPSS 1.0%CVE-2021-23278HIGHArbitrary File deleteEPSS 1.0%CVE-2018-0214—A vulnerability in certain CLI commands of Cisco Identity Services Engine (ISE) could allow an authenticated, local attacker to execute arbiEPSS 1.0%CVE-2023-2315HIGHPath Traversal in OpenCart versions 4.0.0.0 to 4.0.2.2EPSS 1.0%CVE-2025-43430MEDIUMThis issue was addressed through improved state management. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, EPSS 1.0%CVE-2021-35254HIGHAuthenticated Remote Code Execution in WebHelpDesk 12.7.8EPSS 1.0%CVE-2023-29293LOWAdobe Commerce | Improper Input Validation (CWE-20)EPSS 1.0%CVE-2021-43448MEDIUMONLYOFFICE all versions as of 2021-11-08 is vulnerable to Improper Input Validation. A lack of input validation can allow an attacker to spoEPSS 1.0%CVE-2020-3244MEDIUMCisco ASR 5000 Series Aggregation Services Routers Enhanced Charging Service Rule Bypass VulnerabilityEPSS 1.0%CVE-2019-15988MEDIUMCisco Email Security Appliance URL Filtering Bypass VulnerabilityEPSS 1.0%CVE-2026-48384MEDIUMColdFusion | Improper Input Validation (CWE-20)EPSS 1.0%CVE-2023-26022MEDIUMIBM Db2 denial of serviceEPSS 1.0%CVE-2022-39226MEDIUMDiscourse user profile location and website fields were not sufficiently length-limitedEPSS 1.0%CVE-2021-39186MEDIUMImproper Input Validation in GlobalNewFilesEPSS 1.0%CVE-2020-8100CRITICALIncomplete validation in detection code in Bitdefender Engines (VA-8589)EPSS 1.0%