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CVE Record

CVE-2025-40894: HTML injection in Alerted Nodes Dashboard in Guardian/CMC before 25.6.0

A Stored HTML Injection vulnerability was discovered in the Alerted Nodes Dashboard functionality due to improper validation on an input parameter. A malicious authenticated user with the required privileges could edit a node label to inject HTML tags. If the system is configured to use the Alerted Nodes Dashboard, and alerts are reported for the affected node, then the injected HTML may render in the browser of a victim user interacting with it, 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.

MediumCVSS 4.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

An authenticated user with node-label editing privileges could store HTML in a node label. In specific dashboard conditions, that HTML may display to another user and support phishing or redirection. Sources state existing validation and Content Security Policy limit impact and prevent full XSS and direct information disclosure.

Executive priority

Treat as a moderate-priority remediation item. It is not described as actively exploited, but affected OT monitoring environments should patch during the next planned maintenance window and tighten label-editing access.

Technical view

CVE-2025-40894 is stored HTML injection in the Alerted Nodes Dashboard of Nozomi Networks Guardian and CMC before 25.6.0. Exploitation requires authenticated low-privileged access, specific privileges, victim interaction, and dashboard use. CVSS is 4.4 with changed scope, low confidentiality and integrity impact, and no availability impact.

Likely exposure

Exposure appears limited to Nozomi Guardian or CMC deployments before 25.6.0 that use the Alerted Nodes Dashboard and allow users to edit node labels.

Exploitation context

The bundle reports no CISA KEV listing and provides no evidence of active exploitation. Attack practicality is constrained by authentication, required privileges, dashboard configuration, alerts for the affected node, and user interaction.

Researcher notes

Key constraints are important: this is stored HTML injection, not confirmed full XSS. Existing validation and CSP reportedly prevent full XSS exploitation and direct information disclosure. Validate exposure through version, dashboard configuration, alert generation, and RBAC review.

Mitigation direction

  • Upgrade Guardian and CMC to 25.6.0 or later per vendor guidance.
  • Restrict node-label editing privileges to trusted administrative roles.
  • Review whether Alerted Nodes Dashboard use is necessary until patched.
  • Monitor vendor and Siemens advisories for updated remediation guidance.

Validation and detection

  • Inventory Guardian and CMC versions and identify systems before 25.6.0.
  • Confirm whether Alerted Nodes Dashboard is configured and used.
  • Review accounts with privileges to edit node labels.
  • Inspect node labels for unexpected HTML-like content.
  • Check alert workflows involving modified node labels.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2025-40894 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
3Timeline events
2ADP providers
3Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N1.32.7Nozomi
2.1CVSS 4.0LowCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N——Nozomi

Vulnerability scoring details

Base CVSS 4.0 score

2.1Low
CVSS 4.0 vector shape for CVE-2025-40894Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Nozomi NetworksGuardian0unaffected
Nozomi NetworksCMC0unaffected
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.