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CVE-2025-41249: Annotation Detection Vulnerability in Spring Framework

Overview

This report provides a detailed analysis of the CVE-2025-41249 vulnerability, a potentially severe security flaw found in the Spring Framework’s annotation detection mechanism. This vulnerability might open the doors for unauthorized access, leading to potential system compromise or data leakage. It primarily affects applications that use Spring Security’s @EnableMethodSecurity feature.

Vulnerability Summary

CVE ID: CVE-2025-41249
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

Spring Framework | All versions prior to patch

How the Exploit Works

An attacker exploiting this vulnerability can manipulate the annotation detection mechanism in the Spring Framework. Specifically, the flaw lies in the incorrect resolution of annotations on methods within type hierarchies with a parameterized super type with unbounded generics. If such annotations are used for authorization decisions, it can lead to unauthorized access.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited:

public class Exploit {
public void exploitMethod() {
ApplicationContext context = new AnnotationConfigApplicationContext(VulnerableClass.class);
VulnerableClass vulnerableClass = context.getBean(VulnerableClass.class);
vulnerableClass.vulnerableMethod();
}
}

In this conceptual example, the attacker leverages the incorrect annotation resolution to call a method that should have been protected by the @EnableMethodSecurity feature, leading to unauthorized actions.

Recommendations for Mitigation

It is crucial for system administrators and developers to immediately apply the vendor-provided patch to address this vulnerability. In the absence of the patch, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation. However, these measures only manage the risk and do not eliminate the underlying vulnerability; hence the patch’s immediate application is highly recommended.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.
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