{"id":"CVE-2025-66376","vendor_project":"Synacor","product":"Zimbra Collaboration Suite (ZCS)","vulnerability_name":"Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability","date_added":"2026-03-18","due_date":"2026-04-01","known_ransomware_use":"Unknown","short_description":"Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability in the Classic UI where attackers could abuse Cascading Style Sheets (CSS) @import directives in email HTML.","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","cwes":"CWE-79","cvss_version":"3.1","cvss_severity":"MEDIUM","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","nvd_published":"2026-01-05","nvd_status":"Analyzed","epss":0.19559,"epss_percentile":0.97263,"cvss_score":6.1,"days_published_to_kev":72,"source":"https://data.cybermax-tools.workers.dev/cve/CVE-2025-66376","by":"CyberMax"}