Spring Expression language property modification using Spring Cloud Gateway Server WebFlux

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

10.0 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS

• CVE-2025-41243: 3.67% estimated exploitation activity in the next 30 days; percentile 89.68 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Spring Cloud Gateway Server Webflux may be vulnerable to Spring Environment property modification. An application should be considered vulnerable when all the following are true: The application is using Spring Cloud Gateway Server Webflux (Spring Cloud Gateway Server WebMVC is not vulnerable). Spring Boot actuator is a dependency. The Spring Cloud Gateway Server Webflux actuator web endpoint is enabled via management.endpoints.web.exposure.include=gateway. The actuator endpoints are available to attackers. The actuator endpoints are unsecured.

Published by the source

16 Sep 2025, 15:32 UTC

Last modified by the source

16 Sep 2025, 20:20 UTC

Source last checked

26 Oct 2026, 16:40 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-q2cj-h8fw-q4cc

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# Patch Next advisory brief: CVE-2025-41243

Advisory: Spring Expression language property modification using Spring Cloud Gateway Server WebFlux
IDs: CVE-2025-41243, GHSA-q2cj-h8fw-q4cc
Record: https://patchnext.com/advisories/cve-2025-41243 (revision 1, source checked 26 Oct 2026, 16:40 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 10.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: org.springframework.cloud:spring-cloud-gateway-server-webflux 4.3.1, 4.2.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.springframework.cloud:spring-cloud-gateway-server-webflux: 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 4.3.1, 4.2.5

## Suggested inspection (read-only)
- Maven org.springframework.cloud:spring-cloud-gateway-server-webflux: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.springframework.cloud:spring-cloud-gateway-server-webflux.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-q2cj-h8fw-q4cc (GitHub-reviewed advisory GHSA-q2cj-h8fw-q4cc lists affected ranges: Maven org.springframework.cloud:spring-cloud-gateway-server-webflux >=3.1.0 =4.0.0 =4.2.0 =4.3.0 <4.3.1)

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