Weaknesses of type CWE-20

5,847 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-2023-30442MEDIUMIBM Db2 denial of serviceEPSS 1.3%CVE-2021-36321HIGHDell Networking X-Series firmware versions prior to 3.0.1.8 contain an improper input validation vulnerability. A remote unauthenticated attEPSS 1.3%CVE-2026-42537CRITICALApache Ranger: Remote Code Execution via JDBC URL InjectionEPSS 1.3%CVE-2020-1662HIGHJunos OS and Junos OS Evolved: RPD crash due to BGP session flapping.EPSS 1.3%CVE-2020-7504—A CWE-20: Improper Input Validation vulnerability exists in Easergy T300 (Firmware version 1.5.2 and older) which could allow an attacker toEPSS 1.3%CVE-2023-41746HIGHRemote command execution due to improper input validation. The following products are affected: Acronis Cloud Manager (Windows) before buildEPSS 1.3%CVE-2023-41748HIGHRemote command execution due to improper input validation. The following products are affected: Acronis Cloud Manager (Windows) before buildEPSS 1.3%CVE-2022-36058HIGHelrond-go MultiESDTNFTTransfer call on a SC address with missing function nameEPSS 1.3%CVE-2026-85979HIGHCommand Injection in Puppet EnterpriseEPSS 1.3%CVE-2025-31281CRITICALAn input validation issue was addressed with improved memory handling. This issue is fixed in iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, EPSS 1.3%CVE-2023-1973HIGHUndertow: unrestricted request storage leads to memory exhaustionEPSS 1.3%CVE-2025-31233MEDIUMThe issue was addressed with improved input sanitization. This issue is fixed in iOS 18.5 and iPadOS 18.5, iPadOS 17.7.7, macOS Sequoia 15.5EPSS 1.3%CVE-2024-3657HIGH389-ds-base: potential denial of service via specially crafted kerberos as-req requestEPSS 1.3%CVE-2020-3370MEDIUMCisco Content Security Management Appliance Filter Bypass VulnerabilityEPSS 1.3%CVE-2020-3164MEDIUMCisco ESA, Cisco WSA, and Cisco SMA GUI Denial of Service VulnerabilityEPSS 1.3%CVE-2021-40127MEDIUMCisco Small Business 200, 300, and 500 Series Switches Web-Based Management Interface Denial of Service VulnerabilityEPSS 1.3%CVE-2024-38194HIGHAzure Web Apps Elevation of Privilege VulnerabilityEPSS 1.3%CVE-2019-10937—A vulnerability has been identified in SIMATIC TDC CP51M1 (All versions < V1.1.7). An attacker with network access to the device could causeEPSS 1.3%CVE-2022-30232HIGHA CWE-20: Improper Input Validation vulnerability exists that could cause potential remote code execution when an attacker is able to intercEPSS 1.3%CVE-2021-22766HIGHA CWE-20: Improper Input Validation vulnerability exists in PowerLogic EGX100 (Versions 3.0.0 and newer) and PowerLogic EGX300 (All VersionsEPSS 1.3%