CVE-2025-5186 in JeeSite
Summary
by MITRE • 05/26/2025
A vulnerability was found in thinkgem JeeSite up to 5.11.1. It has been rated as critical. Affected by this issue is the function ResourceLoader.getResource of the file /cms/fileTemplate/form of the component URI Scheme Handler. The manipulation of the argument Name leads to server-side request forgery. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 08/26/2025
The vulnerability identified as CVE-2025-5186 represents a critical server-side request forgery flaw within the thinkgem JeeSite framework version 5.11.1 and earlier. This issue resides in the ResourceLoader.getResource function located within the URI Scheme Handler component, specifically affecting the cms/fileTemplate/form file. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly handle user-supplied resource names, creating an avenue for malicious actors to manipulate the system's resource resolution process. The flaw allows attackers to construct malicious URI schemes that can trigger unauthorized requests to arbitrary external systems, potentially enabling data exfiltration, internal network reconnaissance, or further exploitation of vulnerable components within the target environment.
The technical implementation of this vulnerability exploits the URI Scheme Handler's insufficient validation of the Name argument parameter within the ResourceLoader.getResource function. When a user-provided name parameter is processed without proper sanitization, the system becomes susceptible to crafted requests that can redirect resource loading operations to malicious external endpoints. This type of vulnerability aligns with CWE-918, which specifically addresses server-side request forgery vulnerabilities, and demonstrates how improper input handling can lead to unauthorized resource access. The attack vector is particularly concerning as it can be executed remotely without requiring authentication, making the exploitation accessible to any attacker with network access to the vulnerable system. The public disclosure of the exploit means that threat actors can readily leverage this vulnerability for malicious purposes.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling attackers to perform reconnaissance activities against internal systems, exfiltrate sensitive data, or establish persistent access points within the target network. The server-side nature of the vulnerability means that successful exploitation can result in complete system compromise, particularly when the application is running with elevated privileges or has access to sensitive internal resources. Organizations utilizing JeeSite versions up to 5.11.1 face significant risk exposure, as the vulnerability can be exploited to bypass security controls and access resources that should remain protected. The remote exploit capability further amplifies the threat landscape, allowing attackers to target vulnerable systems from anywhere on the internet without requiring physical access or insider knowledge.
Mitigation strategies for CVE-2025-5186 should prioritize immediate patching of affected JeeSite installations to version 5.11.2 or later, which contains the necessary security fixes. Organizations should implement network-level controls including firewall rules that restrict outbound connections from the application server to prevent unauthorized external communications. Input validation should be strengthened at multiple layers, including application-level sanitization of URI parameters and implementation of allowlists for permitted resource names. The principle of least privilege should be enforced by running the application with minimal necessary permissions and limiting access to sensitive system resources. Security monitoring should be enhanced to detect anomalous resource loading patterns that may indicate exploitation attempts. Additionally, organizations should consider implementing web application firewalls and intrusion detection systems to provide additional layers of protection against this specific attack vector. The vulnerability demonstrates the critical importance of proper URI handling and input validation in preventing server-side request forgery attacks, aligning with ATT&CK technique T1190 for server-side request forgery and emphasizing the need for comprehensive security controls throughout the application lifecycle.