CVE-2025-34272: 
Nagios Log Server vulnerability analysis and mitigation

CVE-2025-34272 is a dashboard fallback vulnerability in Nagios Log Server that can expose sensitive information to low-privileged authenticated users. When a user's configured default dashboard is deleted, the application fails to reliably fall back to an empty default dashboard, potentially presenting another user's dashboard as the default view. This affects all Nagios Log Server versions prior to 2024R2.0.3, including the 2024R1.x and 2024R2.0.x release lines. It was published on October 30, 2025, with a patch released in version 2024R2.0.3. The vulnerability carries a CVSS v3.1 base score of 6.5 (Medium) and a CVSS v4.0 base score of 5.3 (Medium) (Red Hat CVE, Nagios Security).

The root cause is classified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor), stemming from improper fallback logic in the dashboard management subsystem. When a user's default dashboard is deleted, the application should substitute an empty, neutral default dashboard; instead, it may resolve to another existing dashboard that the user would not normally be authorized to view. Exploitation requires only a low-privileged authenticated account and no user interaction, making it accessible over the network with low attack complexity. No public technical write-up or proof-of-concept code has been identified (Nagios Security, VulnCheck Advisory).

Successful exploitation allows a low-privileged authenticated user to view dashboards or log data they are not authorized to access, resulting in a confidentiality impact. Depending on the dashboard sharing and access policies configured in the deployment, this could expose sensitive log data, infrastructure details, or operational information visible in another user's dashboard. There is no integrity or availability impact, and lateral movement potential is limited; however, exposed log data could facilitate further reconnaissance of the monitored environment (Red Hat CVE, VulnCheck Advisory).

There is no known public proof-of-concept exploit and no evidence of in-the-wild exploitation at this time. The EPSS score is approximately 0.44%, indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, and no threat actor attribution has been reported (Red Hat CVE, Nagios Security).

Nagios has released version 2024R2.0.3 which addresses this vulnerability by ensuring reliable fallback to an empty default dashboard when a user's configured dashboard is deleted. Organizations should upgrade to 2024R2.0.3 or later as the primary remediation step. As interim mitigations, administrators should review and restrict dashboard sharing permissions, implement strict access controls for dashboard management, and regularly audit user dashboard access configurations to limit exposure (Nagios Security, Nagios Changelog).

The vulnerability received routine coverage from automated vulnerability tracking services and aggregators shortly after disclosure on October 30, 2025. Red Hat published a CVE entry, and VulnCheck issued a dedicated advisory. No notable researcher commentary, vendor statements beyond the patch release, or significant social media discussion has been identified (Red Hat CVE, VulnCheck Advisory).