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-2020-1672HIGHJunos OS: jdhcpd process crash when processing a specific DHCPDv6 packet in DHCPv6 relay configuration.EPSS 1.0%CVE-2021-1221MEDIUMCisco Webex Meetings and Cisco Webex Meetings Server Software Hyperlink Injection VulnerabilityEPSS 1.0%CVE-2026-1668HIGHInput Validation Vulnerability on Multiple Omada SwitchesEPSS 1.0%CVE-2019-13932—A vulnerability has been identified in XHQ (All versions < V6.0.0.2). The web application requests could be manipulated, causing the the appEPSS 1.0%CVE-2020-3139MEDIUMCisco Application Policy Infrastructure Controller Out Of Band Management IP Tables Bypass VulnerabilityEPSS 1.0%CVE-2022-0567—A flaw was found in ovn-kubernetes. This flaw allows a system administrator or privileged attacker to create an egress network policy that bEPSS 1.0%CVE-2022-22539—When a user opens a manipulated JPEG file format (.jpg, 2d.x3d) received from untrusted sources in SAP 3D Visual Enterprise Viewer - versionEPSS 1.0%CVE-2021-30501—An assertion abort was found in upx MemBuffer::alloc() in mem.cpp, in version UPX 4.0.0. The flow allows attackers to cause a denial of servEPSS 1.0%CVE-2023-25915CRITICALAuthenticated Remote Command Execution in Danfoss AK-SM800AEPSS 1.0%CVE-2018-0303—A vulnerability in the Cisco Discovery Protocol component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adEPSS 1.0%CVE-2018-10921MEDIUMCertain input files may trigger an integer overflow in ttembed input file processing. This overflow could potentially lead to corruption of EPSS 1.0%CVE-2025-31477CRITICALImproper Scope Validation in the open Endpoint of tauri-plugin-shellEPSS 1.0%CVE-2023-2315HIGHPath Traversal in OpenCart versions 4.0.0.0 to 4.0.2.2EPSS 1.0%CVE-2026-28335HIGHSolarWinds Dameware Buffer Overflow VulnerabilityEPSS 1.0%CVE-2023-5188HIGHWAGO Improper Input Validation in IEC61850 Server / TelecontrolEPSS 1.0%CVE-2025-55270LOWHCL Aftermarket DPC is affected by Improper Input ValidationEPSS 1.0%CVE-2024-26181MEDIUMWindows Kernel Denial of Service VulnerabilityEPSS 1.0%CVE-2021-42121MEDIUMDenial of Service via Invalid Date Format in TopEaseEPSS 1.0%CVE-2021-27420MEDIUMGE UR family input validationEPSS 1.0%CVE-2020-1756—In Moodle before 3.8.2, 3.7.5, 3.6.9 and 3.5.11, insufficient input escaping was applied to the PHP unit webrunner admin tool.EPSS 1.0%