Security readout for executives and security teams
Plain-English summary
Older versions of Nagios XI, a popular IT monitoring tool, contain a flaw in the Tools Menu that lets an attacker trick a logged-in user's browser into running malicious script. An attacker would need a victim to click a crafted link or visit a tampered page while signed in, but a successful attack could hijack the session or steal data shown in the console.
Executive priority
Plan a routine upgrade if any Nagios XI instance predates 2012R2.6; this is not an emergency but should not linger. Prioritize ahead of other medium-severity work where the monitoring console is internet-facing or used by mixed-trust staff.
Technical view
Nagios XI versions prior to 2012R2.6 are affected by a reflected/stored cross-site scripting (XSS) issue (CWE-79) in the Tools Menu of the web interface. Insufficient validation or output escaping of user-supplied input allows arbitrary script execution in the victim's browser context. CVSS 4.0 is 5.1 (AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N), reflecting authenticated attacker, required user interaction, and impact limited to a subsequent system.
Likely exposure
Exposure is limited to organizations still running Nagios XI builds older than 2012R2.6 with the web UI reachable to users who could be socially engineered. The vulnerability requires a low-privileged authenticated session and victim interaction, so externally exposed legacy consoles or shared monitoring portals carry the highest practical risk.
Exploitation context
No KEV listing or public reports of active exploitation are cited in the source bundle. Exploitation requires an authenticated attacker to lure a victim into triggering injected script via the Tools Menu. Impact is confined to the victim's browser session, not direct compromise of the Nagios XI server.
Researcher notes
CWE-79 reflected/stored XSS in the Tools Menu component. CVSS 4.0 vector indicates PR:L and UI:P, with no confidentiality/integrity/availability impact on the vulnerable system but Low impact on a subsequent system (browser session). The fix landed in 2012R2.6, suggesting the issue is historical and unlikely to affect currently supported builds. No exploit code, PoC, or KEV evidence provided in the bundle.
Mitigation direction
- Upgrade Nagios XI to version 2012R2.6 or later per vendor changelog.
- Restrict web UI access to trusted networks and authenticated administrators only.
- Enforce least-privilege roles so low-trust users cannot reach the Tools Menu.
- Apply browser-side defenses such as Content Security Policy on the Nagios host.
- Review Nagios audit logs for anomalous Tools Menu activity by low-privilege users.
Validation and detection
- Identify the running Nagios XI version via the admin About page or release files.
- Cross-reference the version against the 2012R2.6 fix listed in the vendor changelog.
- Inventory Nagios XI accounts and confirm no unnecessary low-privilege users exist.
- Check whether the web interface is reachable from untrusted networks or the internet.
- Review web server logs for suspicious payload patterns referencing Tools Menu endpoints.
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-2013-10074 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
- 5.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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.
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:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.nagios.com/changelog/nagios-xi/CVE reference · release-notes, patch
- https://www.vulncheck.com/advisories/nagios-xi-xss-via-tools-menuCVE reference · third-party-advisory
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.