CISA KEV 정보
| 취약점명 | Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability |
|---|---|
| 설명 | 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. |
| 조치사항 | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
| 랜섬웨어 캠페인 악용 | Unknown |
| CWE | CWE-79 |
| 등록일 (KEV) | 2025-10-07 |
| 조치 기한 | 2025-10-28 |
| 추가 참고 | https://wiki.zimbra.com/wiki/Security_Center ; https://nvd.nist.gov/vuln/detail/CVE-2025-27915 |
NVD 상세 정보
CVSS v3.1: 5.4 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N설명: 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.
CWE: CWE-79
참조
- https://wiki.zimbra.com/wiki/Security_Center [Release Notes]
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.13#Security_Fixes [Release Notes]
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.5#Security_Fixes [Release Notes]
- https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P44#Security_Fixes [Release Notes]
- https://strikeready.com/blog/0day-ics-attack-in-the-wild/ [Exploit, Third Party Advisory]
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-27915 [US Government Resource]
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