Weaknesses of type CWE-20

5,439 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-2021-39252MEDIUMA crafted NTFS image can cause an out-of-bounds read in ntfs_ie_lookup in NTFS-3G < 2021.8.22.EPSS 0.4%CVE-2025-37173HIGHImproper Input Handling Vulnerability in Authenticated Configuration API Endpoint (AOS-10/AOS-8 Web UI)EPSS 0.4%CVE-2024-27241MEDIUMZoom Apps and SDKs - Improper Input ValidationEPSS 0.4%CVE-2020-1677HIGHJuniper Networks Mist Cloud UI: SAML authentication attribute elements handling vulnerability.EPSS 0.4%CVE-2026-41890MEDIUMCI4MS: Arbitrary Database Table Drop via Theme deleteProcessEPSS 0.4%CVE-2026-22255HIGHiccDEV has heap-buffer-overflow in CIccCLUT::Init() at IccProfLib/IccTagLut.cppEPSS 0.4%CVE-2017-12255—A vulnerability in the CLI of Cisco UCS Central Software could allow an authenticated, local attacker to gain shell access. The vulnerabilitEPSS 0.4%CVE-2026-15792MEDIUMPossible panic when incorrect parameters sent from frontendEPSS 0.4%CVE-2025-26477MEDIUMDell ECS version 3.8.1.4 and prior contain an Improper Input Validation vulnerability. A low privileged attacker with remote access could poEPSS 0.4%CVE-2025-59207HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 0.4%CVE-2022-34146HIGHImproper input validation in WLAN HostEPSS 0.4%CVE-2023-0867MEDIUMMultiple stored and reflected Cross-site Scripting in webappEPSS 0.4%CVE-2026-25941MEDIUMFreeRDP: vuln_1_15_1 RDPGFX WIRE_TO_SURFACE_2 Out-of-Bounds ReadEPSS 0.4%CVE-2022-40502HIGHImproper input validation in WLAN HostEPSS 0.4%CVE-2021-39253MEDIUMA crafted NTFS image can cause an out-of-bounds read in ntfs_runlists_merge_i in NTFS-3G < 2021.8.22.EPSS 0.4%CVE-2026-26953MEDIUMPi-hole Web Interface has Stored HTML Injection via X-Forwarded-For Header in Active Sessions TableEPSS 0.4%CVE-2024-1854MEDIUMEssential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates <= 4.5.1 - Authenticated (Contributor+) Stored Cross-Site ScriptingEPSS 0.4%CVE-2024-2027MEDIUMReal Media Library: Media Library Folder & File Manager <= 4.22.7 - Authenticated (Contributor+) Stored Cross-Site ScriptingEPSS 0.4%CVE-2024-3747MEDIUMBlocksy <= 2.0.39 - Authenticated (Contributor+) Stored Cross-Site Scripting via About Me blockEPSS 0.4%CVE-2024-8445MEDIUM389-ds-base: server crash while modifying `userpassword` using malformed input (incomplete fix for cve-2024-2199)EPSS 0.4%