Weaknesses of type CWE-20

5,842 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-2022-3140—Macro URL arbitrary script executionEPSS 7.0%CVE-2018-0159HIGHA vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE SoftwaEPSS 6.9%KEVCVE-2017-3792—A vulnerability in a proprietary device driver in the kernel of Cisco TelePresence Multipoint Control Unit (MCU) Software could allow an unaEPSS 6.8%CVE-2023-28274HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 6.8%CVE-2023-36049HIGH.NET, .NET Framework, and Visual Studio Elevation of Privilege VulnerabilityEPSS 6.8%CVE-2025-14156CRITICALFox LMS – WordPress LMS Plugin 1.0.4.7 - 1.0.5.1 - Unauthenticated Privilege Escalation via 'createOrder'EPSS 6.8%CVE-2018-0253—A vulnerability in the ACS Report component of Cisco Secure Access Control System (ACS) could allow an unauthenticated, remote attacker to eEPSS 6.7%CVE-2025-14558HIGHRemote code execution via ND6 Router AdvertisementsEPSS 6.7%CVE-2024-26170HIGHWindows Composite Image File System (CimFS) Elevation of Privilege VulnerabilityEPSS 6.6%CVE-2023-36731HIGHWin32k Elevation of Privilege VulnerabilityEPSS 6.6%CVE-2020-10885HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1EPSS 6.5%CVE-2025-54248HIGHAdobe Experience Manager | Improper Input Validation (CWE-20)EPSS 6.5%CVE-2018-16875MEDIUMThe crypto/x509 package of Go before 1.10.6 and 1.11.x before 1.11.3 does not limit the amount of work performed for each chain verificationEPSS 6.5%CVE-2022-26531MEDIUMMultiple improper input validation flaws were identified in some CLI commands of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71EPSS 6.4%CVE-2024-56132HIGHImproper Input Validation vulnerability of Authenticated User in Progress LoadMaster allows : OS Command Injection.EPSS 6.3%CVE-2021-22924LOWlibcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errEPSS 6.3%CVE-2016-8624MEDIUMcurl before version 7.51.0 doesn't parse the authority component of the URL correctly when the host name part ends with a '#' character, andEPSS 6.3%CVE-2020-14343—A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it proEPSS 6.2%CVE-2024-38244HIGHKernel Streaming Service Driver Elevation of Privilege VulnerabilityEPSS 6.2%CVE-2016-7072MEDIUMAn issue has been found in PowerDNS Authoritative Server before 3.4.11 and 4.0.2 allowing a remote, unauthenticated attacker to cause a deniEPSS 6.2%