Fallos del tipo CWE-83

35 resultados

Falha ao neutralizar URIs perigosos em atributos HTML

A aplicação não remove ou remove incorretamente URIs como `javascript:` de atributos perigosos de tags HTML (onmouseover, onload, onerror, style, etc). Isso permite que um atacante injete código JavaScript que será executado no navegador da vítima quando o atributo for acionado.

Ejemplo

Um site que exibe comentários de usuários sem sanitizar o HTML pode permitir que alguém injete `<img src=x onerror="alert('xss')">` ou `<div onmouseover="javascript:window.location='http://malicioso.com'">`. Quando outro usuário visualiza a página, o código é executado no seu navegador.

Cómo mitigar

Use bibliotecas de sanitização robustas (DOMPurify, bleach, htmlspecialchars com flag correta) que removem atributos perigosos inteiros ou valide contra uma whitelist rigorosa de tags e atributos permitidos. Nunca confie apenas em bloqueios de string como remover 'javascript:' — use bibliotecas testadas para XSS.

CVE-2024-26283HIGHAn attacker could have executed unauthorized scripts on top origin sites using a JavaScript URI when opening an external URL with a custom FEPSS 0.3%CVE-2026-58391MEDIUMOPNsense: Stored XSS in Firewall Rules/NAT pages via a HTML-attribute breakoutEPSS 0.3%CVE-2026-108260HIGH@tinacms/web-components: `tina-markdown` writes rich-text link URLs into `href` without scheme validation, allowing stored XSSEPSS 0.3%CVE-2025-67163MEDIUMA stored cross-site scripting (XSS) vulnerability in Simple Machines Forum v2.1.6 allows attackers to execute arbitrary web scripts or HTML EPSS 0.3%CVE-2026-112356MEDIUMGFI KerioConnect < 10.0.9p2 XSS via Link Auto-FormatterEPSS 0.3%CVE-2026-22849HIGHSaleor lacks proper HTML sanitization in rich text fieldsEPSS 0.2%CVE-2026-112353MEDIUMGFI KerioConnect < 10.0.8p2 Stored XSS via SVG AttachmentEPSS 0.2%CVE-2024-9103MEDIUMPersistent XSS in blocked messagesEPSS 0.2%CVE-2026-58263HIGHJodit Editor: Mutation XSS in jodit clean-html via a MathML/style rawtext carrierEPSS 0.2%CVE-2026-53841LOWOpenClaw < 2026.5.12 - Cross-Site Scripting via Unsafe Markdown Links in Exported Session HTMLEPSS 0.2%CVE-2025-11682HIGHStored Cross-Site Scripting in Perx Customer Engagement & Loyalty PlatformEPSS 0.2%CVE-2026-45669MEDIUMNuxt: Reflected XSS in `navigateTo()` external redirectEPSS 0.2%CVE-2026-23516HIGHCVAT vulnerable to XSS via skeleton SVG imagesEPSS 0.2%CVE-2026-8245MEDIUMConcrete CMS 9.5.0 and below is vulnerable to Reflected XSS in Legacy Pagination via HTML attribute injectionEPSS 0.1%CVE-2026-48591MEDIUMStored XSS via unescaped HTML attribute values in earmarkEPSS 0.1%