Weaknesses of type CWE-20

5,399 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-2020-14513—CodeMeter (All versions prior to 6.81) and the software using it may crash while processing a specifically crafted license file due to unverEPSS 1.6%CVE-2022-24847HIGHImproper Input Validation in GeoServerEPSS 1.6%CVE-2019-12632MEDIUMCisco Finesse Request Processing Server-Side Request Forgery VulnerabilityEPSS 1.6%CVE-2022-36085HIGHOPA Compiler: Bypass of WithUnsafeBuiltins using `with` keyword to mock functionsEPSS 1.6%CVE-2025-0938MEDIUMURL parser allowed square brackets in domain namesEPSS 1.6%CVE-2020-3226HIGHCisco IOS and IOS XE Software Session Initiation Protocol Denial of Service VulnerabilityEPSS 1.6%CVE-2022-4886HIGHIngress-nginx `path` sanitization can be bypassed with `log_format` directiveEPSS 1.6%CVE-2018-1000037MEDIUMIn Artifex MuPDF 1.12.0 and earlier, multiple reachable assertions in the PDF parser allow an attacker to cause a denial of service (assert EPSS 1.6%CVE-2023-6395MEDIUMMock: privilege escalation for users that can access mock configurationEPSS 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-2020-7842MEDIUMD'live AP command injection vulnerabilityEPSS 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-2018-0256—A vulnerability in the peer-to-peer message processing functionality of Cisco Packet Data Network Gateway could allow an unauthenticated, reEPSS 1.5%CVE-2026-44343CRITICALWGDashboard: Critical Vulnerability in 4.3.2EPSS 1.5%CVE-2020-8476MEDIUMABB Central Licensing System - Elevation of Privilege VulnerabilityEPSS 1.5%CVE-2020-15256HIGHPrototype pollution in object-pathEPSS 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-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-2021-28655MEDIUMApache Zeppelin: Arbitrary file deletion vulnerabilityEPSS 1.5%