Description Contao 3.x before 3.5.32 allows XSS via the unsubscribe module in the frontend newsletter extension. Remediation References CVE-2018-5478 Related Vulnerabilities Envoy Proxy Always-Incorrect Control Flow Implementation Vulnerability (CVE-2024-53271) Atlassian Jira Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2010-1165) WordPress Plugin Popup Maker-Popup for opt-ins, lead gen, & more Information Disclosure (1.8.11) Dolibarr Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2019-16687) Oracle JRE Incorrect Authorization Vulnerability (CVE-2025-21502) Severity Medium Classification CVE-2018-5478 CWE-707 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Tags Missing Update Known Vulnerabilities