Vulnerability · Published Nov 17, 2025 · Assigned by VulnCheck
CVE-2025-34323Nagios Log Server < 2026R1.0.1 Local Privilege Escalation via Writable Scripts and Sudo Rules
High 8.5
In plain English
A high-severity incorrect permission assignment in Log Server from Nagios. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 29% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
Nagios Log Server versions prior to 2026R1.0.1 are vulnerable to local privilege escalation due to a combination of sudo misconfiguration and group-writable application directories. The 'www-data' user is a member of the 'nagios' group, which has write access to '/usr/local/nagioslogserver/scripts', while several scripts in this directory are owned by root and may be executed via sudo without a password. A local attacker running as 'www-data' can move one of these root-owned scripts to a backup name and create a replacement script with attacker-controlled content at the original path, then invoke it with sudo. This allows arbitrary commands to be executed with root privileges, providing full compromise of the underlying operating system.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Nagios | Log Server | 0 – before 2026R1.0.1 |
Weakness: CWE-732 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://www.nagios.com/products/security/#log-server vendor-advisory, patch
- https://www.nagios.com/changelog/nagios-log-server/nagios-log-server-2026r1-0-1/ release-notes, patch
- https://www.vulncheck.com/advisories/nagios-log-server-local-privilege-escalation-via-writable-scripts-and-sudo-rules third-party-advisory
- https://theyhack.me/Rooting-Nagios-Log-Server/ technical-description, exploit