CVE-2025-3567 in Echo 开源社区系统
Summary
by MITRE • 04/14/2025
A vulnerability, which was classified as problematic, was found in veal98 小牛肉 Echo 开源社区系统 4.2. Affected is the function preHandle of the file src/main/java/com/greate/community/controller/interceptor/LoginTicketInterceptor.java of the component Ticket Handler. The manipulation leads to improper authorization. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 06/13/2026
This vulnerability represents a critical authorization flaw within the veal98 小牛肉 Echo open source community system version 4.2, specifically targeting the Ticket Handler component. The issue resides in the preHandle function located within src/main/java/com/greate/community/controller/interceptor/LoginTicketInterceptor.java file, where improper authorization checks fail to properly validate user credentials and session tokens. The vulnerability classification as problematic indicates significant security implications that could allow unauthorized access to protected system resources and functionalities. This authorization bypass flaw enables attackers to circumvent the normal authentication mechanisms that should verify user identities before granting access to restricted areas of the application. The vulnerability's remote exploitability means that malicious actors can potentially leverage this flaw from external network locations without requiring physical access to the system infrastructure. Security researchers have already disclosed the exploit details to the public, which significantly increases the risk of widespread exploitation across vulnerable installations. The compromised authorization mechanism could potentially allow attackers to access user accounts, modify system configurations, or perform administrative functions that should be restricted to authorized personnel only.
The technical implementation of this vulnerability stems from inadequate validation within the LoginTicketInterceptor's preHandle method, which serves as a crucial security checkpoint in the application's request processing pipeline. This interceptor is designed to verify user authentication status before allowing access to protected resources, but the flawed implementation fails to properly authenticate incoming requests or validate the legitimacy of session tickets. The vulnerability creates a path for attackers to bypass the normal authentication flow by manipulating request parameters or session tokens that should normally be validated before granting access. According to CWE classification, this represents a weakness in authorization mechanisms where proper access control checks are not enforced, potentially falling under CWE-285 for improper authorization or CWE-306 for missing authentication. The flaw essentially allows unauthorized users to present fake or compromised authentication tokens that the system incorrectly accepts as valid, effectively undermining the entire authentication framework.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling comprehensive system compromise and data breaches within affected organizations. Attackers who successfully exploit this authorization flaw could gain access to sensitive user data, community forums, private messages, and potentially administrative controls that allow for system modification or complete takeover. The remote exploitation capability means that organizations cannot rely on network segmentation or firewall rules to protect against this specific threat vector, as the attack can originate from anywhere on the internet. This vulnerability particularly impacts community platforms where user-generated content and private communications are prevalent, making it attractive to threat actors seeking to harvest personal information or establish persistent access points. The disclosure of the exploit to the public community accelerates the likelihood of successful attacks, as security teams may not have sufficient time to implement patches before the vulnerability is actively exploited in the wild.
Organizations utilizing veal98 小牛肉 Echo community system version 4.2 must implement immediate remediation measures to address this authorization vulnerability. The most effective mitigation strategy involves patching the LoginTicketInterceptor implementation to enforce proper authentication checks and validate all session tokens before granting access to protected resources. Security teams should also implement additional monitoring and logging mechanisms to detect potential exploitation attempts, particularly around authentication-related activities and unauthorized access patterns. Network-level protections such as rate limiting and access control lists can provide additional defense-in-depth measures, though these are not substitutes for proper code-level fixes. Organizations should conduct thorough security assessments of their entire application stack to identify any similar authorization flaws that may exist in other components or modules. According to ATT&CK framework, this vulnerability aligns with T1078 for valid accounts and T1566 for malicious code execution through unauthorized access points. Regular security audits and vulnerability scanning should be implemented to prevent similar issues in future development cycles, with emphasis on proper authentication and authorization implementation practices. The incident underscores the critical importance of secure coding practices and the need for comprehensive security testing throughout the software development lifecycle to prevent such authorization bypass vulnerabilities from reaching production environments.