# 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.

- **Severity:** High 8.4 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Oct 2025
- **Updated:** 17 Nov 2025
- **Also known as:** GHSA-gvrp-ffhh-698m

## 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 (Incorrect Permission Assignment for Critical Resource)

## Which versions are affected by CVE-2025-34287?

It affects 1 product.


Products: 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

- [CVE-2021-25296](https://insights.sbomify.com/CVE-2021-25296/): Nagios XI OS Command Injection (high 8.8, exploited in the wild)
- [CVE-2021-25297](https://insights.sbomify.com/CVE-2021-25297/): Nagios XI OS Command Injection (high 8.8, exploited in the wild)
- [CVE-2021-25298](https://insights.sbomify.com/CVE-2021-25298/): Nagios XI OS Command Injection (high 8.8, exploited in the wild)
- [CVE-2019-15949](https://insights.sbomify.com/CVE-2019-15949/): Nagios XI Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2024-24401](https://insights.sbomify.com/CVE-2024-24401/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34287 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2025-34287 in the wild and no public exploit code.

Affected product: Nagios Nagios Xi. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34287/ (Markdown: https://insights.sbomify.com/CVE-2025-34287/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34287
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34287
- OSV: https://osv.dev/vulnerability/CVE-2025-34287

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34287/
Summaries are generated and may contain mistakes; the official description above is the record.