{"id":"CVE-2025-27915","vendor_project":"Synacor","product":"Zimbra Collaboration Suite (ZCS)","vulnerability_name":"Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability","date_added":"2025-10-07","due_date":"2025-10-28","known_ransomware_use":"Unknown","short_description":"Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that exists in the Classic Web Client due to insufficient sanitization of HTML content in ICS files. When a user views an e-mail message containing a malicious ICS entry, its embedded JavaScript executes via an ontoggle event inside a tag. This allows an attacker to run arbitrary JavaScript within the victim's session, potentially leading to unauthorized actions such as setting e-mail filters to redirect messages to an attacker-controlled address. As a result, an attacker can perform unauthorized actions on the victim's account, including e-mail redirection and data exfiltration.","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:L/UI:R/S:C/C:L/I:L/A:N","nvd_published":"2025-03-12","nvd_status":"Analyzed","epss":0.03986,"epss_percentile":0.90061,"cvss_score":5.4,"days_published_to_kev":209,"source":"https://data.cybermax-tools.workers.dev/cve/CVE-2025-27915","by":"CyberMax"}