CVE-2025-34287 Nagios XI < 2024R2 Privilege Escalation via process_perfdata.pl
An attacker with web server privileges can modify a writable script to execute arbitrary code as the nagios user, enabling local privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34287?
CVE-2025-34287 is a high-severity vulnerability in Nagios Nagios Xi, published on 30 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Nagios XI versions prior to 2024R2 contain an improperly owned script, process_perfdata.pl, which is executed periodically as the nagios user but owned by www-data. Because the file was writable by www-data, an attacker with web server privileges could modify its contents, leading to arbitrary code execution as the nagios user when the script is next run. This improper ownership and permission configuration enables local privilege escalation.
Weakness: CWE-732
Which versions are affected by CVE-2025-34287?
It affects 1 product.
Products include Nagios Nagios Xi.
How do I fix CVE-2025-34287?
No fix has been published for CVE-2025-34287 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-34287 being exploited?
There is no known exploitation of CVE-2025-34287 in the wild and no public exploit code.
Other vulnerabilities in Nagios Nagios Xi
Sources
Also known as GHSA-gvrp-ffhh-698m.