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-2021-22768CRITICALA CWE-20: Improper Input Validation vulnerability exists in PowerLogic EGX100 (Versions 3.0.0 and newer) and PowerLogic EGX300 (All VersionsEPSS 2.8%CVE-2018-0419—A vulnerability in certain attachment detection mechanisms of Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote aEPSS 2.8%CVE-2024-0057CRITICALNET, .NET Framework, and Visual Studio Security Feature Bypass VulnerabilityEPSS 2.8%CVE-2022-24098HIGHAdobe Photoshop PCX File Parsing Memory Corruption Remote Code Execution VulnerabilityEPSS 2.8%CVE-2019-11687HIGHAn issue was discovered in the DICOM Part 10 File Format in the NEMA DICOM Standard 1995 through 2019b and continuing in current implementatEPSS 2.8%CVE-2020-6655MEDIUMFile parsing Out-Of-Bounds read remote code executionEPSS 2.8%CVE-2019-1741HIGHCisco IOS XE Software Encrypted Traffic Analytics Denial of Service VulnerabilityEPSS 2.8%CVE-2014-2357—SUBNET SubSTATION Server 2 Telegyr 8979 Master Protocol Improper Input ValidationEPSS 2.8%CVE-2022-45875CRITICALApache DolphinScheduler: Remote command execution Vulnerability in script alert pluginEPSS 2.8%CVE-2019-1710CRITICALCisco IOS XR 64-Bit Software for Cisco ASR 9000 Series Aggregation Services Routers Network Isolation VulnerabilityEPSS 2.8%CVE-2018-12547—In Eclipse OpenJ9, prior to the 0.12.0 release, the jio_snprintf() and jio_vsnprintf() native methods ignored the length parameter. This affEPSS 2.7%CVE-2024-38095HIGH.NET and Visual Studio Denial of Service VulnerabilityEPSS 2.7%CVE-2023-47804—Apache OpenOffice: Macro URL arbitrary script executionEPSS 2.7%CVE-2025-21230HIGHMicrosoft Message Queuing (MSMQ) Denial of Service VulnerabilityEPSS 2.7%CVE-2023-36707MEDIUMWindows Deployment Services Denial of Service VulnerabilityEPSS 2.7%CVE-2018-0371—A vulnerability in the Web Admin Interface of Cisco Meeting Server could allow an authenticated, remote attacker to cause a denial of servicEPSS 2.7%CVE-2021-3580—A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to proviEPSS 2.7%CVE-2021-36048HIGHXMP Toolkit SDK Improper Input Validation Could Lead To Arbitrary Code ExecutionEPSS 2.7%CVE-2021-36047HIGHXMP Toolkit SDK Improper Input Validation Could Lead To Arbitrary Code ExecutionEPSS 2.7%CVE-2021-32974CRITICALMoxa NPort IAW5000A-I/O Series Serial Device Server Improper Input ValidationEPSS 2.7%