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-2018-0303—A vulnerability in the Cisco Discovery Protocol component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adEPSS 1.1%CVE-2022-39346LOWMissing length validation of user displayname in nextcloud serverEPSS 1.1%CVE-2020-3546MEDIUMCisco Email Security Appliance Information Disclosure VulnerabilityEPSS 1.1%CVE-2019-16029HIGHCisco Smart Software Manager On-Prem Web Interface Denial of Service VulnerabilityEPSS 1.1%CVE-2020-8102HIGHInsufficient URL sanitization and validation in Safepay Browser (VA-8631)EPSS 1.1%CVE-2021-1470MEDIUMCisco SD-WAN SQL Injection VulnerabilityEPSS 1.1%CVE-2022-2385HIGHAccessKeyID validation bypassEPSS 1.1%CVE-2021-1534MEDIUMCisco Email Security Appliance URL Filtering Bypass VulnerabilityEPSS 1.1%CVE-2025-58364MEDIUMcups: Remote DoS via null dereferenceEPSS 1.1%CVE-2020-29507MEDIUMDell BSAFE Crypto-C Micro Edition, versions before 4.1.4, and Dell BSAFE Micro Edition Suite, versions before 4.4, contain an Improper InputEPSS 1.1%CVE-2022-39389HIGHWitness Block Parsing DoS Vulnerability in lndEPSS 1.1%CVE-2023-22460HIGHgo-ipld-prime json codec may panic if asked to encode bytesEPSS 1.1%CVE-2022-22538—When a user opens a manipulated Adobe Illustrator file format (.ai, ai.x3d) received from untrusted sources in SAP 3D Visual Enterprise ViewEPSS 1.1%CVE-2026-18911HIGHManageEngine DataSecurity Plus versions before 6310 are vulnerable to an agent authentication bypass, allowing unenrolled agents to send reqEPSS 1.1%CVE-2021-27420MEDIUMGE UR family input validationEPSS 1.1%CVE-2024-26240HIGHSecure Boot Security Feature Bypass VulnerabilityEPSS 1.1%CVE-2022-32797HIGHThis issue was addressed with improved checks. This issue is fixed in Security Update 2022-005 Catalina, macOS Big Sur 11.6.8, macOS MontereEPSS 1.1%CVE-2026-20967HIGHSystem Center Operations Manager (SCOM) Elevation of Privilege VulnerabilityEPSS 1.1%CVE-2021-22288HIGHSECURITY – Denial of Service Vulnerabilities in SPIET800 INFI-Net to Ethernet Transfer module and PNI800 S+ Ethernet communication interface moduleEPSS 1.1%CVE-2021-22286HIGHSECURITY – Denial of Service Vulnerabilities in SPIET800 INFI-Net to Ethernet Transfer module and PNI800 S+ Ethernet communication interface moduleEPSS 1.1%