# CVE-2025-2767: Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability

> Remote attackers can execute arbitrary code as root via XSS in the User-Agent header of Arista NG Firewall.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Apr 2025
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-vcjh-9r25-r392

## What is CVE-2025-2767?

CVE-2025-2767 is a high-severity cross-site scripting vulnerability in Arista NG Firewall, published on 23 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability.

The specific flaw exists within the processing of the User-Agent HTTP header. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-24407.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-2767?

It affects 1 product.


Products: Arista Ng Firewall.

## How do I fix CVE-2025-2767?

No fix has been published for CVE-2025-2767 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-2767 being exploited?

There is no known exploitation of CVE-2025-2767 in the wild and no public exploit code.

## Other vulnerabilities in Arista NG Firewall

- [CVE-2024-9188](https://insights.sbomify.com/CVE-2024-9188/): Specially constructed queries cause cross platform scripting leaking administrator tokens (high 8.8)
- [CVE-2024-27889](https://insights.sbomify.com/CVE-2024-27889/): SQL injection in Arista Edge Threat Management - Arista NG Firewall (NGFW) (high 8.8)
- [CVE-2024-47519](https://insights.sbomify.com/CVE-2024-47519/): Backup uploads to ETM subject to man-in-the-middle interception (high 8.3)
- [CVE-2024-9134](https://insights.sbomify.com/CVE-2024-9134/): SQL injection in Arista Edge Threat Management (high 8.3)
- [CVE-2024-12832](https://insights.sbomify.com/CVE-2024-12832/): Arista NG Firewall ReportEntry SQL Injection Arbitrary File Read and Write Vulnerability (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-2767 and fix it if it is affected.

What it is: CVE-2025-2767 is a high-severity cross-site scripting vulnerability in Arista NG Firewall, published on 23 Apr 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-2767 in the wild and no public exploit code.

Affected product: Arista NG Firewall. 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-2025-2767/ (Markdown: https://insights.sbomify.com/CVE-2025-2767/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-2767
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-2767
- OSV: https://osv.dev/vulnerability/CVE-2025-2767

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-2767/
Summaries are generated and may contain mistakes; the official description above is the record.