Falhas do tipo CWE-20

5.887 resultados

Validação inadequada de entrada

A aplicação recebe dados do usuário ou de fontes externas mas não valida (ou valida mal) se esses dados têm as propriedades necessárias para processamento seguro. Isso abre porta para injeção de código, buffer overflow, lógica corrompida e outros ataques que exploram dados malformados ou maliciosos.

Exemplo

Um formulário web aceita um CPF sem verificar se tem 11 dígitos numéricos, ou um app móvel recebe um ID de usuário em JSON sem confirmar se é um inteiro — atacantes exploram isso para acessar dados de outros usuários, executar queries SQL maliciosas ou causar erro de processamento.

Como mitigar

Implemente validação rigorosa na entrada: verifique tipo, comprimento, formato, intervalo de valores permitidos. Use whitelist (aceitar só o que você sabe ser seguro) em vez de blacklist. Valide tanto no cliente quanto no servidor, e use bibliotecas de parsing seguro para formatos complexos (XML, JSON).

CVE-2019-12632MEDIUMCisco Finesse Request Processing Server-Side Request Forgery VulnerabilityEPSS 1.6%CVE-2022-24847HIGHImproper Input Validation in GeoServerEPSS 1.6%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-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-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-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-2023-24865MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%CVE-2023-24866MEDIUMMicrosoft PostScript and PCL6 Class Printer Driver Information Disclosure VulnerabilityEPSS 1.5%