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-2022-39353CRITICALxmldom allows multiple root nodes in a DOMEPSS 1.6%CVE-2020-3226HIGHCisco IOS and IOS XE Software Session Initiation Protocol Denial of Service VulnerabilityEPSS 1.6%CVE-2023-6395MEDIUMMock: privilege escalation for users that can access mock configurationEPSS 1.6%CVE-2019-7617—When the Elastic APM agent for Python versions before 5.1.0 is run as a CGI script, there is a variable name clash flaw if a remote attackerEPSS 1.6%CVE-2019-18247—An attacker may use a specially crafted message to force Relion 650 series (versions 1.3.0.5 and prior) or Relion 670 series (versions 1.2.3EPSS 1.6%CVE-2019-13524—GE PACSystems RX3i CPE100/115: All versions prior to R9.85,CPE302/305/310/330/400/410: All versions prior to R9.90,CRU/320 All versions(End EPSS 1.5%CVE-2020-8476MEDIUMABB Central Licensing System - Elevation of Privilege VulnerabilityEPSS 1.5%CVE-2020-15256HIGHPrototype pollution in object-pathEPSS 1.5%CVE-2020-27824—A flaw was found in OpenJPEG’s encoder in the opj_dwt_calc_explicit_stepsizes() function. This flaw allows an attacker who can supply crafteEPSS 1.5%CVE-2025-0938MEDIUMURL parser allowed square brackets in domain namesEPSS 1.5%CVE-2021-27388—SINAMICS medium voltage routable products are affected by a vulnerability in the Sm@rtServer component for remote access that could allow anEPSS 1.5%CVE-2018-16556HIGHA vulnerability has been identified in SIMATIC S7-400 CPU 412-1 DP V7 (All versions), SIMATIC S7-400 CPU 412-2 DP V7 (All versions), SIMAEPSS 1.5%CVE-2017-6759—A vulnerability in the UpgradeManager of the Cisco Prime Collaboration Provisioning Tool 12.1 could allow an authenticated, remote attacker EPSS 1.5%CVE-2026-21893CRITICALn8n Vulnerable to Command Injection in Community Package InstallationEPSS 1.5%CVE-2021-21394MEDIUMDenial of service (via resource exhaustion) due to improper input validation on third-party identifier endpointsEPSS 1.5%CVE-2024-21663CRITICALRemote code execution on ReconServer due to improper input sanitization on the prips commandEPSS 1.5%CVE-2023-24866MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2023-24865MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2020-11261HIGHMemory corruption due to improper check to return error when user application requests memory allocation of a huge size in Snapdragon Auto, EPSS 1.5%KEVCVE-2019-1766HIGHCisco IP Phone 8800 Series File Upload Denial of Service VulnerabilityEPSS 1.5%