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CVE-2025-66376

Quick assessment

Affected
Zimbra Collaboration
Exploitation
Confirmed exploitation in the wild; remediate immediately
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zimbra Collaboration是Zimbra公司的一个开源企业级电子邮件与协作平台，支持邮件、日历、文档管理及团队协作功能。 Zimbra Collaboration 10.0.18之前版本和10.1.13之前版本存在跨站脚本漏洞，该漏洞源于HTML电子邮件中CSS导入指令处理不当，可能导致存储型跨站脚本。

CVSS 7.2 · High KEV EPSS 20.23% · P97
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I. Basic Information for CVE-2025-66376

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Zimbra Collaboration 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zimbra Collaboration是Zimbra公司的一个开源企业级电子邮件与协作平台，支持邮件、日历、文档管理及团队协作功能。 Zimbra Collaboration 10.0.18之前版本和10.1.13之前版本存在跨站脚本漏洞，该漏洞源于HTML电子邮件中CSS导入指令处理不当，可能导致存储型跨站脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Zimbra Collaboration 10.0 ~ 10.0.18 -

II. Public POCs for CVE-2025-66376

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III. Intelligence Information for CVE-2025-66376

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Vendor Advisories for CVE-2025-66376 (3)

Vendor Pages for CVE-2025-66376 (1)

IV. Related Vulnerabilities

Same product: Collaboration
Same vendor: Zimbra
Same weakness: CWE-79

V. Comments for CVE-2025-66376

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