Weaknesses of type CWE-20

4,982 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-2016-3714HIGHThe (1) EPHEMERAL, (2) HTTPS, (3) MVG, (4) MSL, (5) TEXT, (6) SHOW, (7) WIN, and (8) PLT coders in ImageMagick before 6.9.3-10 and 7.x beforEPSS 97.5%KEVCVE-2023-23397CRITICALMicrosoft Outlook Elevation of Privilege VulnerabilityEPSS 97.4%KEVCVE-2026-34197HIGHApache ActiveMQ Broker, Apache ActiveMQ All, Apache ActiveMQ: Authenticated users could perform RCE via Jolokia MBeansEPSS 97.2%KEVCVE-2025-54236CRITICALAdobe Commerce | Improper Input Validation (CWE-20)EPSS 96.7%KEVCVE-2019-1652HIGHCisco Small Business RV320 and RV325 Routers Command Injection VulnerabilityEPSS 95.9%KEVCVE-2023-21554CRITICALMicrosoft Message Queuing (MSMQ) Remote Code Execution VulnerabilityEPSS 95.5%CVE-2024-21413CRITICALMicrosoft Outlook Remote Code Execution VulnerabilityEPSS 94.7%KEVCVE-2024-31309HIGHApache Traffic Server: HTTP/2 CONTINUATION frames can be utilized for DoS attackEPSS 94.6%CVE-2023-28302HIGHMicrosoft Message Queuing (MSMQ) Denial of Service VulnerabilityEPSS 93.6%CVE-2020-1350CRITICALA remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows EPSS 91.4%KEVCVE-2024-5276CRITICALSQL Injection Vulnerability in FileCatalyst Workflow 5.1.6 Build 135 (and earlier)EPSS 90.1%CVE-2020-3243CRITICALMultiple Vulnerabilities in Cisco UCS Director and Cisco UCS Director Express for Big DataEPSS 88.4%CVE-2020-27131HIGHCisco Security Manager Java Deserialization VulnerabilitiesEPSS 87.7%CVE-2023-2868CRITICALRemote Code injection in Barracuda Email Security GatewayEPSS 87.4%KEVCVE-2026-34910CRITICALA malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute aEPSS 87.0%KEVCVE-2024-25641CRITICALCacti RCE vulnerability when importing packagesEPSS 86.3%CVE-2021-3781—A trivial sandbox (enabled with the `-dSAFER` option) escape flaw was found in the ghostscript interpreter by injecting a specially crafted EPSS 83.9%CVE-2020-3161CRITICALCisco IP Phones Web Server Remote Code Execution and Denial of Service VulnerabilityEPSS 83.7%KEVCVE-2023-39265LOWApache Superset: Possible Unauthorized Registration of SQLite Database ConnectionsEPSS 83.7%CVE-2012-0151HIGHThe Authenticode Signature Verification function in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows SeEPSS 83.5%KEV