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CVE-2025-40903— HTML injection in Schedule Restore Archive 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 Guardian和Nozomi Networks CMC都是美国Nozomi Networks公司的产品。Nozomi Networks Guardian是一款物联网设备和软件检查系统。Nozomi Networks CMC是一个应用软件。提供集中的OT和IoT安全管理。 Nozomi Networks Guardian和Nozomi Networks CMC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定义包含HTM

CVSS 5.9 · Medium EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

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-2025-40903

Vulnerability Information
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Vulnerability Title
HTML injection in Schedule Restore Archive in Guardian/CMC before 26.1.0
Source: CVE Program / CVE List V5
Vulnerability Description
A Stored HTML Injection vulnerability was discovered in the Schedule Restore Archive functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can define a malicious restore schedule containing HTML tags. When a victim views the affected schedule, 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 Guardian和Nozomi Networks CMC 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nozomi Networks Guardian和Nozomi Networks CMC都是美国Nozomi Networks公司的产品。Nozomi Networks Guardian是一款物联网设备和软件检查系统。Nozomi Networks CMC是一个应用软件。提供集中的OT和IoT安全管理。 Nozomi Networks Guardian和Nozomi Networks CMC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定义包含HTM
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-2025-40903

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III. Intelligence Information for CVE-2025-40903

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Vendor Advisories for CVE-2025-40903 (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-2025-40902 5.9 MEDIUM HTML injection in Users 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-2025-40903

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