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2025-06-23
Zimbra Collaboration Suite (ZCS) Classic UI Cross-Site Scripting (XSS) Vulnerability (CVE-2025-48700) Security Advisory
[Affected Scope] Zimbra Collaboration Suite (ZCS) versions 8.8.15, 9.0, 10.0, and 10.1 utilizing the Classic UI
[Impact] Attackers can execute arbitrary JavaScript within the victim's session by sending a crafted email, potentially leading to session hijacking and unauthorized access to sensitive data without requiring user interaction beyond viewing the email
[Mitigation] Immediately apply the latest security patches provided by Zimbra, or temporarily restrict the use of the Classic UI and deploy WAF rules