# CVE-2025-63603: Command injection in n/a

> Attackers can execute arbitrary Python code with full system privileges via the run_script tool due to unrestricted builtins in safe_eval.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Nov 2025
- **Updated:** 18 Nov 2025
- **Also known as:** GHSA-h4jc-wm4j-2vrp

## What is CVE-2025-63603?

CVE-2025-63603 is a medium-severity command injection vulnerability in n/a, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A command injection vulnerability exists in the MCP Data Science Server's (reading-plus-ai/mcp-server-data-exploration) 0.1.6 in the safe_eval() function (src/mcp_server_ds/server.py:108). The function uses Python's exec() to execute user-supplied scripts but fails to restrict the __builtins__ dictionary in the globals parameter. When __builtins__ is not explicitly defined, Python automatically provides access to all built-in functions including __import__, exec, eval, and open. This allows an attacker to execute arbitrary Python code with full system privileges, leading to complete system compromise. The vulnerability can be exploited by submitting a malicious script to the run_script tool, requiring no authentication or special privileges.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2025-63603?

It affects 1 product.


Products: Mcp Server for Data Exploration Project Mcp Server for Data Exploration.

## How do I fix CVE-2025-63603?

No fix has been published for CVE-2025-63603 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-63603 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63603 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-63603 and fix it if it is affected.

What it is: CVE-2025-63603 is a medium-severity command injection vulnerability in n/a, published on 18 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63603 exists.

Affected product: n/a. 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-2025-63603/ (Markdown: https://insights.sbomify.com/CVE-2025-63603/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-63603
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-63603
- OSV: https://osv.dev/vulnerability/CVE-2025-63603

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-63603/
Summaries are generated and may contain mistakes; the official description above is the record.