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CVE Record

CVE-2025-40893: HTML injection in Asset List in Guardian/CMC before 25.5.0

A Stored HTML Injection vulnerability was discovered in the Asset List functionality due to improper validation of network traffic data. An unauthenticated attacker can send specially crafted network packets to inject HTML tags into asset attributes. When a victim views the affected assets in the Asset List (and similar functions), 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.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

An unauthenticated attacker can place HTML content into asset details by sending crafted network traffic. The content appears when staff view affected assets, creating credible phishing or redirect risks. Existing validation and browser security controls reportedly prevent full cross-site scripting and direct data disclosure.

Executive priority

Schedule remediation promptly within the normal medium-severity patch cycle, prioritizing systems monitoring untrusted or broadly accessible networks. Accelerate action if suspicious asset metadata appears or operators frequently inspect automatically discovered assets. This issue is socially exploitable but is not documented here as enabling full browser compromise.

Technical view

Guardian and CMC before 25.5.0 improperly validate network-derived asset attributes, allowing stored HTML injection. Exploitation requires a victim to view the affected asset in the Asset List or similar interface. CVSS 3.1 is 6.1, reflecting network reachability, low complexity, no privileges, required user interaction, and limited confidentiality and integrity impact.

Likely exposure

Exposure is most likely where Guardian or CMC versions before 25.5.0 process attacker-controlled network traffic and operators subsequently inspect discovered assets. The source bundle does not establish that the management interface must be internet-accessible. Its structured affected-version fields are ambiguous, so confirm exact applicability with Nozomi's advisory.

Exploitation context

The bundle reports no CISA KEV listing and provides no evidence of active exploitation. Abuse could support phishing or open redirects within a trusted operational interface. Full cross-site scripting and direct information disclosure are reportedly blocked by existing input validation and Content Security Policy controls.

Researcher notes

CWE-79 applies to stored HTML injection in network-derived asset attributes. Required user interaction and existing validation/CSP reduce impact. The title identifies versions before 25.5.0, but the supplied structured affected entries contain version "0" with default status "unaffected"; researchers should rely on vendor advisories for precise version mapping.

Mitigation direction

  • Upgrade affected Guardian and CMC installations to version 25.5.0 or later, following vendor guidance.
  • Restrict Asset List access to authorized operators while upgrades are pending.
  • Limit untrusted network traffic reaching monitored environments where operationally feasible.
  • Review Nozomi and Siemens advisories for deployment-specific instructions or updated mitigations.

Validation and detection

  • Inventory Guardian and CMC deployments and record their exact versions.
  • Treat versions before 25.5.0 as potentially affected until vendor applicability is confirmed.
  • Inspect asset attributes for unexpected HTML-like content or suspicious links.
  • Confirm Content Security Policy protections remain enabled and unmodified.
  • After upgrading, verify displayed asset attributes no longer render injected markup.
Prepared
Confidence
medium
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-2025-40893 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
6.1CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Nozomi
5.3CVSS 4.0MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N——Nozomi

Vulnerability scoring details

Base CVSS 4.0 score

5.3Medium
CVSS 4.0 vector shape for CVE-2025-40893Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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.

CWE-79 · source CWE mapping

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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