Security readout for executives and security teams
Plain-English summary
This flaw lets an attacker trick a logged-in Nagios XI user into opening a crafted URL that runs attacker-controlled JavaScript in that user’s browser session. The business risk is account misuse or data exposure inside monitoring workflows, especially for administrators.
Executive priority
Prioritize normal patch governance, with faster handling for externally reachable or administrator-heavy Nagios environments. This is not supported as actively exploited, but XSS in monitoring administration can still affect sensitive operational visibility.
Technical view
CVE-2025-56432 is a CWE-79 cross-site scripting issue in Nagios XI 2024R2. The source says it affects a web component rendering performance-related data. CVSS 3.1 is 6.1: network reachable, low complexity, no privileges required, user interaction required, changed scope, low confidentiality and integrity impact.
Likely exposure
Exposure is most likely where Nagios XI 2024R2 is deployed and users access the web UI. The structured affected-product fields are incomplete, so teams should verify exact applicability against Nagios guidance.
Exploitation context
The bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires user interaction: a logged-in user must open a specially crafted URL. Treat internet-reachable or broadly accessible Nagios portals as higher risk.
Researcher notes
The evidence names Nagios XI 2024R2 and a performance-data rendering component, but does not include precise endpoint details, affected CPEs, or a named fixed version. Avoid assuming broader Nagios product exposure without vendor confirmation.
Mitigation direction
- Check Nagios guidance and changelog for a fixed release or official workaround.
- Upgrade affected Nagios XI deployments if Nagios identifies a corrected version.
- Restrict Nagios XI web access to trusted networks, VPN, or administrative jump hosts.
- Warn administrators not to open unsolicited Nagios links while logged in.
- Review session security controls and monitor for suspicious UI activity.
Validation and detection
- Inventory Nagios XI instances and confirm whether any run 2024R2.
- Review Nagios changelog and CVE records for exact affected and fixed versions.
- Confirm the Nagios web UI is not broadly exposed to untrusted networks.
- Check access logs for unusual crafted URLs targeting performance-data views.
- Verify remediation by confirming the installed version 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-2025-56432 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
- 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
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
1 official scoreWe 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:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
6.1MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/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://www.nagios.com/changelog/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.
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.