CVE-2025-34283
Published: 30 October 2025
Summary
CVE-2025-34283 is a high-severity Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-497) vulnerability in Nagios Nagios Xi. Its CVSS base score is 7.1 (High).
Operationally, ranked in the top 18.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
Nagios XI versions prior to 2024R1.4.2 contain an information disclosure flaw (CWE-497) that exposes API keys to authenticated users lacking API privileges when the Neptune theme is active. The affected component is the web interface handling user API key display, allowing an unauthorized viewer to retrieve either their own key or keys belonging to other users.
An authenticated attacker with low privileges can exploit the issue over the network to obtain valid API credentials, enabling subsequent unauthorized access to Nagios XI APIs without requiring additional user interaction or elevated permissions. The CVSS 7.1 score reflects the combination of network reachability, low attack complexity, and high confidentiality impact.
Nagios advisory information and the associated changelog indicate that the issue is resolved in version 2024R1.4.2; administrators are directed to apply the update via the vendor’s security and changelog resources. The VulnCheck advisory further references these Nagios pages for patch and mitigation guidance.
EPSS remains low, with a current value of 0.0155 and a peak of 0.0162, showing no material increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-37214
Vulnerability details
Nagios XI versions prior to 2024R1.4.2 revealed API keys to users who were not authorized for API access when using Neptune themes. An authenticated user without API privileges could view another user's or their own API key value.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Ongoing reviews detect and remove sensitive system information before it reaches publicly accessible systems.
Employs detection to prevent unauthorized mining of sensitive system information from being exfiltrated to external control spheres.
Documenting where system information is processed and stored prevents exposure to unauthorized control spheres.
The control stops sensitive system information from crossing into unauthorized control spheres through EM emanations.
Authorization and minimization requirements keep PII out of test/research control spheres that often lack production-grade protections.
Documented categorization of system information reduces the chance that sensitive internals are left exposed to unauthorized spheres.
System information is concealed or replaced with decoys, reducing leakage to unauthorized observers.
Ensures sensitive system information is not disclosed outside the intended control sphere through error output.