Weaknesses of type CWE-20

5,888 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-2022-28755CRITICALImproper URL parsing in Zoom ClientsEPSS 0.9%CVE-2026-21273HIGHColdFusion | Improper Input Validation (CWE-20)EPSS 0.9%CVE-2020-7871HIGHA vulnerability of Helpcom could allow an unauthenticated attacker to execute arbitrary command. This vulnerability exists due to insufficieEPSS 0.9%CVE-2018-10922HIGHAn input validation flaw exists in ttembed. With a crafted input file, an attacker may be able to trigger a denial of service condition due EPSS 0.9%CVE-2021-37863LOWMattermost 6.0 and earlier fails to sufficiently validate parameters during post creation, which allows authenticated attackers to cause a cEPSS 0.9%CVE-2023-38690MEDIUMmatrix-appservice-irc IRC command injection via admin commands containing newlines EPSS 0.9%CVE-2021-23853HIGHImproper Input Validation of HTTP HeadersEPSS 0.9%CVE-2025-20184MEDIUMCisco Secure Email and Web Manager and Secure Web Appliance Command Injection VulnerabilityEPSS 0.9%CVE-2026-49827CRITICALWebErpMesv2 has Unauthenticated RCE via Unrestricted File Upload in HR Expense scan_file (CWE-434)EPSS 0.9%CVE-2019-1875MEDIUMCisco Prime Service Catalog Cross-Site Scripting VulnerabilityEPSS 0.9%CVE-2022-47189HIGHDoS via file upload vulnerability at Generex CS141EPSS 0.9%CVE-2026-78518HIGHMicrosoft Office Excel Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-69614HIGHMicrosoft Office Access Remote Code Execution VulnerabilityEPSS 0.9%CVE-2018-1070MEDIUMrouting before version 3.10 is vulnerable to an improper input validation of the Openshift Routing configuration which can cause an entire sEPSS 0.9%CVE-2022-26582HIGHPAX A930 device with PayDroid_7.1.1_Virgo_V04.3.26T1_20210419 can allow an attacker to gain root access through command injection in systoolEPSS 0.9%CVE-2025-1077CRITICALRemote Code Execution vulnerability in IBL Software Engineering Visual Weather and derived products (NAMIS, Aero Weather, Satellite Weather)EPSS 0.9%CVE-2021-36322MEDIUMDell Networking X-Series firmware versions prior to 3.0.1.8 contain a host header injection vulnerability. A remote unauthenticated attackerEPSS 0.9%CVE-2023-1289—A vulnerability was discovered in ImageMagick where a specially created SVG file loads itself and causes a segmentation fault. This flaw allEPSS 0.9%CVE-2024-44808CRITICALAn issue in Vypor Attack API System v.1.0 allows a remote attacker to execute arbitrary code via the user GET parameter.EPSS 0.9%CVE-2026-55993HIGHApache Camel Atmosphere Websocket: The inbound consumer maps externally-supplied WebSocket query parameters into the Exchange without a HeaderFilterStrategy, allowing injection of Camel control headers - enabling influencing internal behaviourEPSS 0.9%