Weaknesses of type CWE-20

5,887 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-2021-44377HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2021-44358HIGHA denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC-410W v3.0.0.136_20121102. A sEPSS 1.1%CVE-2022-20750MEDIUMCisco Redundancy Configuration Manager for Cisco StarOS Software TCP Denial of Service VulnerabilityEPSS 1.1%CVE-2025-30452CRITICALThe issue was addressed with improved checks. This issue is fixed in macOS Sequoia 15.4, macOS Sonoma 14.7.5, macOS Ventura 13.7.5. An inputEPSS 1.1%CVE-2025-58364MEDIUMcups: Remote DoS via null dereferenceEPSS 1.1%CVE-2020-35493—A flaw exists in binutils in bfd/pef.c. An attacker who is able to submit a crafted PEF file to be parsed by objdump could cause a heap buffEPSS 1.1%CVE-2024-8073CRITICALCommand Injection Vulnerability in Hillstone Networks Web Application FirewallEPSS 1.1%CVE-2020-7848HIGHThe EFM ipTIME C200 IP Camera is affected by a Command Injection vulnerability in /login.cgi?logout=1 script. To exploit this vulnerability,EPSS 1.1%CVE-2025-8266MEDIUMyanyutao0402 ChanCMS collect.js getArticle deserializationEPSS 1.1%CVE-2026-42613CRITICALGrav: Privilege Escalation via Missing Server-Side Validation of groups/accessEPSS 1.1%CVE-2023-2727MEDIUMBypassing policies imposed by the ImagePolicyWebhook admission pluginEPSS 1.1%CVE-2024-1481MEDIUMFreeipa: specially crafted http requests potentially lead to denial of serviceEPSS 1.1%CVE-2024-52279HIGHApache Zeppelin: Arbitrary file read by adding malicious JDBC connection stringEPSS 1.1%CVE-2025-64988HIGHCommand Injection in 1E-Nomad-GetCmContentLocations InstructionEPSS 1.1%CVE-2025-64987HIGHCommand Injection in 1E-Explorer-TachyonCore-CheckSimpleIoC InstructionEPSS 1.1%CVE-2023-42449HIGHMalicious head initialiser can extract PTs from control of Hydra scripts, leading to locked participant commits or spoofed commitsEPSS 1.1%CVE-2019-15613—A bug in Nextcloud Server 17.0.1 causes the workflow rules to depend their behaviour on the file extension when checking file mimetypes.EPSS 1.1%CVE-2020-26185HIGHDell BSAFE Micro Edition Suite, versions prior to 4.5.1, contain a Buffer Over-Read Vulnerability.EPSS 1.1%CVE-2023-38701CRITICALHydra's committed UTxOs at Commit validator and UTxOs at Initial validator can be spent arbitrarily by anyoneEPSS 1.1%CVE-2022-2385HIGHAccessKeyID validation bypassEPSS 1.1%