CVE Alert: CVE-2025-27915

Vulnerability Summary: CVE-2025-27915

An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0 and 10.1. A stored cross-site scripting (XSS) vulnerability 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.

Affected Endpoints:

No affected endpoints listed.

Published Date:

3/12/2025, 3:15:39 PM

⚠️ CVSS Score:

CVSS v3 Score: 5.4 (Medium)

Exploit Status:

Not Exploited

References:

Recommended Action:

No proposed action available. Please refer to vendor documentation for updates.

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Tags: CVE, OSINT, threatintel