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 easyXDM Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Vulnerability (CVE-2023-27739) WeBid Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2011-3815) Python Use After Free Vulnerability (CVE-2022-48560) Squid Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability (CVE-2013-4115) Apache Traffic Server Improper Input Validation Vulnerability (CVE-2021-32566) 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