Weaknesses of type CWE-20

5,450 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-2025-61684HIGHQuicly has assertion failuresEPSS 0.4%CVE-2019-15959MEDIUMCisco Small Business SPA500 Series IP Phones Local Script Execution VulnerabilityEPSS 0.4%CVE-2023-1732MEDIUMImproper random reading in CIRCLEPSS 0.4%CVE-2026-16434LOWAdminer before 5.5.1 X-Forwarded-Prefix Backslash BypassEPSS 0.4%CVE-2025-27388HIGHArbitrary URL Loading in WebView Leading to Token Leakage RiskEPSS 0.4%CVE-2026-45076MEDIUMSynapse pagination denial of serviceEPSS 0.4%CVE-2026-49444HIGHn8n: Python sandbox escapeEPSS 0.4%CVE-2023-49610HIGHMachineSense FeverWarn Improper Input ValidationEPSS 0.4%CVE-2018-0211—A vulnerability in specific CLI commands for the Cisco Identity Services Engine could allow an authenticated, local attacker to cause a deniEPSS 0.4%CVE-2025-0764MEDIUMwpForo Forum <= 2.4.1 - Authenticated (Subscriber+) Arbitrary File Read in updateEPSS 0.4%CVE-2026-73845MEDIUMCKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)EPSS 0.4%CVE-2023-28911MEDIUMArbitrary Channel Disconnection Resulting in Denial of ServiceEPSS 0.4%CVE-2026-54529MEDIUMSQLAdmin: Unvalidated sortBy parameter in `ModelView` bypasses `column_sortable_list`EPSS 0.4%CVE-2022-32204HIGHThere is an improper input verification vulnerability in Huawei printer product. Successful exploitation of this vulnerability may cause serEPSS 0.4%CVE-2025-43464MEDIUMA denial-of-service issue was addressed with improved input validation. This issue is fixed in macOS Tahoe 26.1. Visiting a website may leadEPSS 0.4%CVE-2026-63627MEDIUMmppx: Gas Draining with paddingEPSS 0.4%CVE-2026-63628MEDIUMmppx: Gas Draining with access listEPSS 0.4%CVE-2026-28907HIGHThe issue was addressed with improved input validation. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOEPSS 0.4%CVE-2025-0814MEDIUMCWE-20: Improper Input Validation vulnerability exists that could cause Denial-of-Service of the network services running on the product wheEPSS 0.4%CVE-2025-5455HIGHPossible denial of service when passing malformed data in a URL to qDecodeDataUrlEPSS 0.4%