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CVE-2025-40902— HTML injection in Users in Guardian/CMC before 26.1.0

Quick assessment

Affected
Nozomi Networks Guardian
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nozomi Networks CMC和Nozomi Networks Guardian都是美国Nozomi Networks公司的产品。Nozomi Networks CMC是一款网络管理平台。Nozomi Networks Guardian是一款防护软件。 Nozomi Networks CMC和Nozomi Networks Guardian存在跨站脚本漏洞，该漏洞源于对输入参数验证不当导致的存储型HTML注入问题，允许具有管理权限的认证用户创建用户名包含HTML标签的恶意用户，当受害者尝试删除包含

CVSS 5.9 · Medium EPSS 0.19% · P9

Affected Version Matrix 2

VendorProduct Version RangeStatus
Nozomi Networks CMC < 26.1.0 affected
Nozomi Networks Guardian < 26.1.0 affected
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I. Basic Information for CVE-2025-40902

Vulnerability Information
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Vulnerability Title
HTML injection in Users in Guardian/CMC before 26.1.0
Source: CVE Program / CVE List V5
Vulnerability Description
A Stored HTML Injection vulnerability was discovered in the Users functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can create a malicious user whose username contains HTML tags. When a victim attempts to delete a group containing the affected user, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
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
Nozomi Networks CMC和Nozomi Networks Guardian 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nozomi Networks CMC和Nozomi Networks Guardian都是美国Nozomi Networks公司的产品。Nozomi Networks CMC是一款网络管理平台。Nozomi Networks Guardian是一款防护软件。 Nozomi Networks CMC和Nozomi Networks Guardian存在跨站脚本漏洞，该漏洞源于对输入参数验证不当导致的存储型HTML注入问题，允许具有管理权限的认证用户创建用户名包含HTML标签的恶意用户，当受害者尝试删除包含
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Nozomi Networks Guardian 0 ~ 26.1.0 -
Nozomi Networks CMC 0 ~ 26.1.0 -

II. Public POCs for CVE-2025-40902

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III. Intelligence Information for CVE-2025-40902

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Vendor Advisories for CVE-2025-40902 (1)

Same Patch Batch · Nozomi Networks · 2026-05-19 · 5 CVEs total

CVE-2025-40904 6.5 MEDIUM HTML injection in Smart Polling in Guardian/CMC before 26.1.0
CVE-2025-40901 5.9 MEDIUM HTML injection in Credentials Manager in Guardian/CMC before 26.1.0
CVE-2025-40903 5.9 MEDIUM HTML injection in Schedule Restore Archive in Guardian/CMC before 26.1.0
CVE-2025-40900 4.6 MEDIUM Angular template injection in Reports in Guardian/CMC before 26.1.0

IV. Related Vulnerabilities

Same product: Guardian
Same vendor: Nozomi Networks
Same weakness: CWE-79

V. Comments for CVE-2025-40902

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