Weaknesses of type CWE-20

5,386 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-2017-7924—An Improper Input Validation issue was discovered in Rockwell Automation MicroLogix 1100 controllers 1763-L16BWA, 1763-L16AWA, 1763-L16BBB, EPSS 22.2%CVE-2023-28130HIGHLocal user may lead to privilege escalation using Gaia Portal hostnames page.EPSS 20.9%CVE-2023-36563MEDIUMMicrosoft WordPad Information Disclosure VulnerabilityEPSS 20.7%KEVCVE-2023-24329HIGHAn issue in the urllib.parse component of Python before 3.11.4 allows attackers to bypass blocklisting methods by supplying a URL that startEPSS 20.5%CVE-2019-15606—Including trailing white space in HTTP header values in Nodejs 10, 12, and 13 causes bypass of authorization based on header value comparisoEPSS 20.0%CVE-2023-36761MEDIUMMicrosoft Word Information Disclosure VulnerabilityEPSS 19.6%KEVCVE-2025-43560CRITICALColdFusion | Improper Input Validation (CWE-20)EPSS 19.4%CVE-2025-60787HIGHMotionEye v0.43.1b4 and before is vulnerable to OS Command Injection in configuration parameters such as image_file_name. Unsanitized user iEPSS 18.5%CVE-2018-0147CRITICALA vulnerability in Java deserialization used by Cisco Secure Access Control System (ACS) prior to release 5.8 patch 9 could allow an unautheEPSS 18.2%KEVCVE-2023-4481HIGHJunos OS and Junos OS Evolved: A crafted BGP UPDATE message allows a remote attacker to de-peer (reset) BGP sessions (CVE-2023-4481)EPSS 18.2%CVE-2024-23469CRITICALSolarWinds Access Rights Manager Exposed Dangerous Method Remote Code Execution VulnerabilityEPSS 17.9%CVE-2016-9587MEDIUMAnsible before versions 2.1.4, 2.2.1 is vulnerable to an improper input validation in Ansible's handling of data sent from client systems. AEPSS 17.4%CVE-2023-2071CRITICALFactoryTalk View Machine Edition Vulnerable to Remote Code ExecutionEPSS 17.3%CVE-2025-30294MEDIUMColdFusion | Improper Input Validation (CWE-20)EPSS 17.2%CVE-2018-0301—A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to craft a packet to the managEPSS 17.0%CVE-2014-0207MEDIUMThe cdf_read_short_sector function in cdf.c in file before 5.19, as used in the Fileinfo component in PHP before 5.4.30 and 5.5.x before 5.5EPSS 16.9%CVE-2022-21820MEDIUMNVIDIA DCGM contains a vulnerability in nvhostengine, where a network user can cause detection of error conditions without action, which mayEPSS 16.5%CVE-2018-0472—Cisco IOS XE Software and Cisco ASA 5500-X Series Adaptive Security Appliance IPsec Denial of Service VulnerabilityEPSS 16.2%CVE-2026-16723CRITICALRemote Code Execution in fastjson 1.2.68–1.2.83EPSS 16.0%CVE-2019-7193CRITICALThis improper input validation vulnerability allows remote attackers to inject arbitrary code to the system. To fix the vulnerability, QNAP EPSS 14.4%KEV