Weaknesses of type CWE-20

5,416 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-2022-0567—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-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-2021-26631HIGHMangboard parameter modulation vulnerabilityEPSS 1.0%CVE-2026-45495HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-76194MEDIUMCAI Content Credentials | Improper Input Validation (CWE-20)EPSS 1.0%CVE-2021-20330MEDIUMSpecific replication command with malformed oplog entries can crash secondariesEPSS 1.0%CVE-2026-75634MEDIUMCAI Content Credentials | Improper Input Validation (CWE-20)EPSS 1.0%CVE-2021-22787HIGHA CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a speciallyEPSS 1.0%CVE-2023-5188HIGHWAGO Improper Input Validation in IEC61850 Server / TelecontrolEPSS 1.0%CVE-2026-20224HIGHCisco Catalyst SD-WAN Manager XML External Entity Injection VulnerabilityEPSS 1.0%CVE-2024-26181MEDIUMWindows Kernel Denial of Service VulnerabilityEPSS 1.0%CVE-2013-4144—There is an object injection vulnerability in swfupload plugin for wordpress.EPSS 1.0%CVE-2021-42121MEDIUMDenial of Service via Invalid Date Format in TopEaseEPSS 1.0%CVE-2021-1221MEDIUMCisco Webex Meetings and Cisco Webex Meetings Server Software Hyperlink Injection VulnerabilityEPSS 1.0%CVE-2024-20684MEDIUMWindows Hyper-V Denial of Service VulnerabilityEPSS 1.0%CVE-2021-22678—Cscape (All versions prior to 9.90 SP4) lacks proper validation of user-supplied data when parsing project files. This could lead to memory EPSS 1.0%CVE-2024-0710MEDIUMGP Unique ID <= 1.5.5 - Unauthenticated Form Submission Unique ID ModificationEPSS 1.0%CVE-2020-2504MEDIUMAbsolute path traversal vulnerability in QESEPSS 1.0%