Fallos del tipo CWE-20

5887 resultados

Validação inadequada de entrada

A aplicação recebe dados de fontes externas (usuário, API, arquivo) sem verificar se estão no formato, tamanho ou tipo esperado antes de usá-los. Isso permite que um atacante envie dados malformados ou maliciosos que podem causar erros, corrupção de dados, execução de código ou acesso não autorizado.

Ejemplo

Um formulário que aceita um número de idade sem validar se é um inteiro positivo entre 0 e 150. Um atacante envia idade=-5 ou idade='DROP TABLE users;' via SQL, e o código processa isso diretamente no banco sem sanitização, causando dano.

Cómo mitigar

Valide TODA entrada externa: verificar tipo, tamanho, formato e intervalo permitido antes de usar. Use whitelists (aceitar apenas valores conhecidos como seguros) em vez de blacklists, e aplique sanitização ou prepared statements para dados que vão em queries. Testes de entrada fuzzing também ajudam a encontrar gaps.

CVE-2024-24683MEDIUMApache Hop Engine: ID isn't escaped when generating HTMLEPSS 1.2%CVE-2018-0135—A vulnerability in Cisco Unified Communications Manager could allow an authenticated, remote attacker to access sensitive information on an EPSS 1.2%CVE-2026-81995CRITICALAdobe Experience Manager Forms JEE | Improper Input Validation (CWE-20)EPSS 1.2%CVE-2026-27953HIGHormar has a Pydantic Validation Bypass via Kwargs Injection in Model ConstructorEPSS 1.2%CVE-2022-44617HIGHA flaw was found in libXpm. When processing a file with width of 0 and a very large height, some parser functions will be called repeatedly EPSS 1.2%CVE-2022-22727—A CWE-20: Improper Input Validation vulnerability exists that could allow an unauthenticated attacker to view data, change settings, impact EPSS 1.2%CVE-2020-3238HIGHCisco IOx Application Framework Arbitrary File Creation VulnerabilityEPSS 1.2%CVE-2016-7073MEDIUMAn issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-EPSS 1.2%CVE-2022-25940HIGHDenial of Service (DoS)EPSS 1.2%CVE-2026-50328HIGHWindows Server Update Service (WSUS) Tampering VulnerabilityEPSS 1.2%CVE-2022-4904HIGHA flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the validity of the input string, which allows a possiEPSS 1.2%CVE-2021-31372HIGHJunos OS: J-Web allows a locally authenticated attacker to escalate their privileges to root.EPSS 1.2%CVE-2025-30355HIGHSynapse vulnerable to federation denial of service via malformed eventsEPSS 1.2%CVE-2020-3478HIGHCisco Enterprise NFV Infrastructure Software File Overwrite VulnerabilityEPSS 1.2%CVE-2016-7074MEDIUMAn issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 4.0.4, allowing an attacker in position of man-in-EPSS 1.2%CVE-2021-43588MEDIUMDell EMC Data Protection Central version 19.5 contains an Improper Input Validation Vulnerability. A remote unauthenticated attacker could pEPSS 1.2%CVE-2021-41114MEDIUMHTTP Host Header Injection in Request Handling in Typo3EPSS 1.2%CVE-2024-45219HIGHApache CloudStack: Uploaded and registered templates and volumes can be used to abuse KVM-based infrastructureEPSS 1.2%CVE-2023-21685HIGHMicrosoft WDAC OLE DB provider for SQL Server Remote Code Execution VulnerabilityEPSS 1.2%CVE-2026-54501CRITICALBrowsertrix: Arbitrary Command Injection due to Improper Command Sanitization in Git URLs specified as Custom BehaviorsEPSS 1.2%