Spring Expression Language property modification using Spring Cloud Gateway Server WebFlux

published 2025-09-16 13 mo ago modified 2026-10-18 21 d ago also GHSA-q2cj-h8fw-q4cc , EUVD-2025-29611

cvss: 10.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.7%; EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known, plus a Nuclei check

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.

Patch / fix

fixed in 2

maven org.springframework.cloud:spring-cloud-gateway-server-webflux 4.2.5, 4.3.1
Spring Cloud Gateway 3.1.11, 4.1.11, 4.2.5, 4.3.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 13 mo ago (2025-09-17)

Exploit prediction

3.67% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Spring Cloud Gateway Server Webflux - Broken Access Control nuclei detection template

CVSS scores

assigned by	version	score	vector
CNA	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
GitHub	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.springframework.cloud:spring-cloud-gateway-server-webflux	>=3.1.0, <=3.1.10 >=4.0.0, <=4.1.10 >=4.2.0, <4.2.5 >=4.3.0, <4.3.1	4.2.5 4.3.1

Affected products

Spring Cloud Gateway

Classification

Weakness

CWE-917 Improper Neutralization of Special Elements used in an Expression Language Statement
CWE-94 Improper Control of Generation of Code

References

spring.io /security/cve-2025-41243
web
nvd.nist.gov /vuln/detail/CVE-2025-41243
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary