RCE in Nagios Log Server
CVE-2025-34277
Nagios Log Server versions prior to 2024R1.3.1 contain a code injection vulnerability where malformed dashboard ID values are not properly validated before being forwarded to an internal API. An attacker able to supply crafted dashboard ID values can cause the system to execute attacker-controlled data, leading to arbitrary code execution in the context of the Log Server process.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.020 (80.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Nagios Log Server — versions 0
- Nagios Log Server — versions 2024
Weakness classification (CWE)
References
- www.nagios.com/products/security/ (Product, vendor-advisory, patch)
- www.nagios.com/changelog/ (release-notes, Release Notes, patch)
- www.vulncheck.com/advisories/nagios-log-server-rce-via-malformed-dashboard-id (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34277?
- CVE-2025-34277 is a critical-severity vulnerability in Nagios Log Server, classified under Code Injection. CVSS score: 9.8/10. Published 2025-10-30.
- How severe is CVE-2025-34277?
- Critical severity. CVSS v3 base score is 9.8 out of 10.