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-2017-12299—A vulnerability exists in the process of creating default IP blocks during device initialization for Cisco ASA Next-Generation Firewall ServEPSS 1.2%CVE-2021-1465MEDIUMA vulnerability in the web-based management interface of Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to condEPSS 1.2%CVE-2022-36784CRITICALElsight – Elsight Halo Remote Code Execution (RCE)EPSS 1.2%CVE-2024-34365CRITICALApache Karaf Cave: Cave SSRF and arbitrary file accessEPSS 1.2%CVE-2022-36023HIGHRemote denial of service in Hyperledger Fabric GatewayEPSS 1.2%CVE-2025-64986HIGHCommand Injection in 1E-Explorer-TachyonCore-DevicesListeningOnAPort InstructionEPSS 1.2%CVE-2021-36335MEDIUMDell EMC CloudLink 7.1 and all prior versions contain an Improper Input Validation Vulnerability. A remote low privileged attacker, may poteEPSS 1.2%CVE-2021-3567—A flaw was found in Caribou due to a regression of CVE-2020-25712 fix. An attacker could use this flaw to bypass screen-locking applicationsEPSS 1.2%CVE-2020-5403MEDIUMDoS Via Malformed URL with Reactor Netty HTTP ServerEPSS 1.2%CVE-2025-27212CRITICALAn Improper Input Validation in certain UniFi Access devices could allow a Command Injection by a malicious actor with access to UniFi AccesEPSS 1.2%CVE-2020-3567MEDIUMCisco Industrial Network Director Denial of Service VulnerabilityEPSS 1.2%CVE-2023-26364MEDIUMDenial of Service of regular expression in package @adobe/css-toolsEPSS 1.2%CVE-2019-15966HIGHA vulnerability in the web application of Cisco TelePresence Advanced Media Gateway could allow an authenticated, remote attacker to cause aEPSS 1.2%CVE-2020-8475MEDIUMABB Central Licensing System - Denial of Service VulnerabilityEPSS 1.2%CVE-2025-1087CRITICALArbitrary Code Execution in Kong Insomnia Desktop ApplicationEPSS 1.1%CVE-2021-42857MEDIUMDirectory Traversal Partial Write at AgentDaServletEPSS 1.1%CVE-2021-32707MEDIUMBypass of image blocking in Nextcloud MailEPSS 1.1%CVE-2021-44379HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44371HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44363HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%