Security readout for executives and security teams
Plain-English summary
An authenticated user who can rename nodes may place HTML into a node label. In affected Guardian or CMC deployments, that content can appear when another user views alerts for the node, creating phishing or redirect risk. Existing controls reportedly prevent full cross-site scripting and direct information disclosure.
Executive priority
Prioritize routine remediation, accelerated where many users can edit labels or the dashboard is heavily used. The issue can support credible internal phishing, but its prerequisites and existing browser protections reduce urgency below high-severity vulnerabilities. Investigate suspicious labels immediately and schedule the vendor-supported update.
Technical view
CVE-2025-40894 is stored HTML injection in the Alerted Nodes Dashboard of Guardian and CMC before 25.6.0. Exploitation requires network access, authentication, label-editing privileges, dashboard use, an alert for the modified node, and victim interaction. CVSS 3.1 is 4.4; availability impact is not reported.
Likely exposure
Exposure is limited to Guardian or CMC versions before 25.6.0 where the Alerted Nodes Dashboard is enabled and authenticated users can edit node labels. The supplied affected-version metadata is internally unclear, listing version "0" as unaffected, so organizations should confirm exact applicability with Nozomi's advisory.
Exploitation context
No active exploitation is established: the bundle says this CVE is not in KEV and provides no exploitation reports. The high-complexity path requires a privileged authenticated user, a malicious node label, an alert for that node, and another user's interaction. Reported outcomes are phishing and possible open redirects, not full XSS.
Researcher notes
The weakness maps to CWE-79, but the vendor description narrows impact to stored HTML injection. Existing validation and Content Security Policy reportedly block full XSS and direct disclosure. Researchers should preserve that distinction. Exact affected-version data in the bundle is inconsistent, so version conclusions should be verified against the vendor advisory.
Mitigation direction
- Follow Nozomi's advisory and upgrade affected Guardian or CMC deployments to version 25.6.0 or later.
- Restrict node-label editing to trusted administrators while remediation is pending.
- Review Alerted Nodes Dashboard usage and apply any additional vendor-recommended mitigations.
Validation and detection
- Inventory Guardian and CMC versions, identifying deployments earlier than 25.6.0.
- Confirm whether the Alerted Nodes Dashboard is configured and actively used.
- Review which authenticated roles can edit node labels.
- Inspect node labels and relevant audit records for unexpected HTML-like content.
- Verify the deployed Content Security Policy remains enabled and matches vendor guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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-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.
Open ATT&CK lookupCVE-2025-40894 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N1.32.7NozomiCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N——NozomiVulnerability scoring details
Base CVSS 4.0 score
2.1LowVector: 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
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://security.nozominetworks.com/NN-2025:16-01CVE reference, Nozomi
- https://cert-portal.siemens.com/productcert/html/ssa-827968.htmlCVE reference, siemens-SADP
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
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.