# CI4MS Vulnerable to Remote Code Execution (RCE) via Arbitrary File Creation and Save in File Editor

Advisory record · `GHSA-gp56-f67f-m4px`

- **Identifiers:** `GHSA-gp56-f67f-m4px` · `CVE-2026-25510` · `PKSA-ztv6-h3sy-m4xc`
- **State:** Confirmed
- **Severity:** CVSS 10.0 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-94](https://cwe.mitre.org/data/definitions/94.html) · [CWE-434](https://cwe.mitre.org/data/definitions/434.html)
- **Tags:** [Code injection](https://agentprime.io/advisories/tag/code-injection.md) · [Unrestricted file upload](https://agentprime.io/advisories/tag/file-upload.md)
- **Published:** 2 Feb 2026
- **Updated:** 4 Feb 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 2 Feb 2026, 21:52 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 10.0: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `ci4-cms-erp/ci4ms` (Packagist): affected `<0.28.5.0`; fixed in `0.28.5.0`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> CI4MS (Packagist package ci4-cms-erp/ci4ms) versions before 0.28.5.0 are vulnerable. An authenticated user with file editor permissions can create PHP files in web-accessible directories and write arbitrary content into them, enabling remote code execution and full compromise of the web server. Upgrade to version 0.28.5.0 or later.

Written 3 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 10.0 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0089, the 60th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:26 UTC: First seen by agentprime
- 31 Oct 2026, 14:26 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-gp56-f67f-m4px)

## Sources

- [GitHub Advisory Database: GHSA-gp56-f67f-m4px](https://github.com/advisories/GHSA-gp56-f67f-m4px)
- [OSV: GHSA-gp56-f67f-m4px](https://osv.dev/vulnerability/GHSA-gp56-f67f-m4px)
- <https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-gp56-f67f-m4px>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-25510>
- <https://github.com/ci4-cms-erp/ci4ms/commit/86be2930d1c54eb7575102563302b2f3bafcb653>
- <https://github.com/ci4-cms-erp/ci4ms>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-gp56-f67f-m4px>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-gp56-f67f-m4px/>. Everything for agents: <https://agentprime.io/llms.txt>.