Security readout for executives and security teams
Plain-English summary
Nagios XI versions 5.11.1 and below are reported vulnerable to authenticated stored XSS through the custom logo alt-text field. Because the injected content appears in the navbar, including the login page, a compromised or low-trust admin user could potentially capture plaintext credentials.
Executive priority
Prioritize remediation for shared, internet-facing, or high-trust monitoring systems. This is not reported as actively exploited, but credential exposure from a monitoring login page can create broader operational risk.
Technical view
The issue is an authenticated XSS in Nagios XI custom logo handling. An attacker with access to that component can place JavaScript or HTML in the alt-text field, and affected pages rendering the navbar may execute or display it. The bundle provides no CVSS, CWE, CPE, or confirmed fixed version.
Likely exposure
Exposure is likely limited to Nagios XI deployments at version 5.11.1 or earlier where authenticated users can manage the custom logo component.
Exploitation context
The source bundle does not claim active exploitation, and the CVE is not listed as KEV. The concerning impact is credential theft because the affected navbar appears on the login page.
Researcher notes
Evidence is useful but incomplete. The CVE description names Nagios XI 5.11.1 and below, but the structured affected data is placeholder and no CVSS, CWE, CPE, or explicit patch version is provided in the bundle.
Mitigation direction
- Identify Nagios XI instances and confirm whether they run version 5.11.1 or below.
- Restrict custom logo component access to highly trusted administrators only.
- Check Nagios vendor security guidance for the fixed or recommended upgrade release.
- Review custom logo alt text for unexpected HTML or script-like content.
- Rotate credentials if suspicious navbar or login-page content is found.
Validation and detection
- Inventory Nagios XI versions across production, staging, and externally reachable systems.
- Review role permissions for users who can modify custom logo settings.
- Inspect current custom logo alt-text values for unauthorized markup.
- Check web logs and admin audit records for recent custom logo changes.
- Confirm remediation against Nagios guidance after applying updates or configuration changes.
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
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CVE-2023-40932 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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://www.nagios.com/products/security/CVE reference, mitre
- https://outpost24.com/blog/nagios-xi-vulnerabilities/CVE reference, mitre
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.