# Spring Expression language property modification using Spring Cloud Gateway Server WebFlux

Advisory record · `GHSA-q2cj-h8fw-q4cc`

- **Identifiers:** `GHSA-q2cj-h8fw-q4cc` · `CVE-2025-41243`
- **State:** Confirmed
- **Severity:** CVSS 10.0 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-94](https://cwe.mitre.org/data/definitions/94.html) · [CWE-917](https://cwe.mitre.org/data/definitions/917.html)
- **Tags:** [Code injection](https://agentprime.io/advisories/tag/code-injection.md)
- **Published:** 16 Sept 2025
- **Updated:** 16 Sept 2025
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 16 Sept 2025, 15:32 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

- `org.springframework.cloud:spring-cloud-gateway-server-webflux` (Maven): affected `>=3.1.0, <=3.1.10 || >=4.0.0, <=4.1.10 || >=4.2.0, <4.2.5 || >=4.3.0, <4.3.1`; fixed in `4.2.5`, `4.3.1`

## 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:N/UI:N/S:C/C:H/I:H/A:H`, from CNA (vmware)

- **CISA KEV:** Not listed.
- **EPSS:** 0.037, the 89th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:10 UTC: First seen by agentprime
- 31 Oct 2026, 15:10 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-q2cj-h8fw-q4cc)

## Sources

- [GitHub Advisory Database: GHSA-q2cj-h8fw-q4cc](https://github.com/advisories/GHSA-q2cj-h8fw-q4cc)
- [OSV: GHSA-q2cj-h8fw-q4cc](https://osv.dev/vulnerability/GHSA-q2cj-h8fw-q4cc)
- <https://nvd.nist.gov/vuln/detail/CVE-2025-41243>
- <https://spring.io/security/cve-2025-41243>

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-q2cj-h8fw-q4cc>, 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-q2cj-h8fw-q4cc/>. Everything for agents: <https://agentprime.io/llms.txt>.