Weaknesses of type CWE-20

5,450 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-2026-5500HIGHImproper Validation of AES-GCM Authentication Tag Length in PKCS#7 Envelope Allows Authentication BypassEPSS 0.4%CVE-2018-0338—A vulnerability in the role-based access-checking mechanisms of Cisco Unified Computing System (UCS) Software could allow an authenticated, EPSS 0.4%CVE-2017-12338—A vulnerability in the CLI of Cisco NX-OS System Software could allow an authenticated, local attacker to read the contents of arbitrary filEPSS 0.4%CVE-2023-54392HIGHPocketMine-MP before 4.22.3 Denial of Service via BlockActorDataPacketEPSS 0.4%CVE-2022-1798HIGHPath Traversal vulnerability in KubevirtEPSS 0.4%CVE-2022-40276MEDIUMZettlr version 2.3.0 allows an external attacker to remotely obtain arbitrary local files on any client that attempts to view a malicious maEPSS 0.4%CVE-2025-63095MEDIUMImproper input validation in the BitstreamWriter::write_bits() function of Tempus Ex hello-video-codec v0.1.0 allows attackers to cause a DeEPSS 0.4%CVE-2025-23041MEDIUMShort and Long Answer Fields Are Not Validated Server-Side For Maximum Length in Umbraco.FormsEPSS 0.4%CVE-2026-88261MEDIUMImproper input validation vulnerability in bizwell xClick allows Stored XSS. This issue affects xClick: R2, R3, and R3.1.EPSS 0.4%CVE-2023-7240MEDIUMBroken Access Control leading to SSRF in NetIQ Identity ConsoleEPSS 0.4%CVE-2026-45013HIGHApostrophe has a Weak Password Recovery Mechanism for Forgotten Password and Improper Input ValidationEPSS 0.4%CVE-2024-58380HIGHPocketMine-MP before 5.11.2 Denial of Service via BookEditPacketEPSS 0.4%CVE-2026-21679HIGHiccDEV has heap-buffer-overflow vulnerability in CIccLocalizedUnicode::GetText()EPSS 0.4%CVE-2025-0051HIGHFlashArray DOS VulnerabilityEPSS 0.4%CVE-2026-97869LOWlangchain4j LangChain4j-agentic AgenticScopeJsonSerializationIT.java AgenticScopeSerializer.fromJson deserializationEPSS 0.4%CVE-2025-13587MEDIUMTwo Factor (2FA) Authentication via Email <= 1.9.8 - Two-Factor Authentication Bypass via tokenEPSS 0.4%CVE-2024-2867MEDIUMPaid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress <= 4.15.4 - Authenticated (Contributor+) Stored Cross-Site ScriptingEPSS 0.4%CVE-2026-43708MEDIUMThe issue was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 andEPSS 0.4%CVE-2023-5421LOW Possible XSS execution in customer information EPSS 0.4%CVE-2024-52593MEDIUMMissing validation allows spoofed "origin" links in MisskeyEPSS 0.4%