CVE-2026-108618 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows low-privileged authenticated users to modify message templates via PUT /sys/message/sysMessageTemplate/edit. Attackers can obtain template ids from the unguarded list endpoint and overwrite system notification titles and content, delivering attacker-supplied text or links to other users.
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Analysis
by VulDB Data Team • 10/11/2026
The vulnerability identified in JeecgBoot versions up to 3.9.5 represents a critical failure in access control mechanisms, specifically categorized under CWE-862: Missing Authorization. This flaw resides within the system's message management module, where the endpoint PUT /sys/message/sysMessageTemplate/edit fails to adequately verify that the authenticated user initiating the request possesses administrative privileges or ownership rights over the specific resource being modified. In a properly secured application architecture, any operation that alters global configuration data such as system notification templates must enforce strict role-based access control checks at both the controller and service layers. The absence of these checks allows low-privileged authenticated users to bypass intended security boundaries and execute state-changing operations reserved for administrators. This type of vulnerability is often associated with CWE-285: Improper Authorization, where the application relies on client-side controls or fails to validate user permissions against server-side policies before processing sensitive requests.
The operational impact of this vulnerability extends beyond simple data modification, as it enables a form of business logic abuse that can lead to broader security compromises. By leveraging an unguarded list endpoint that exposes template identifiers without sufficient access restrictions, attackers can enumerate valid target resources and subsequently craft malicious PUT requests to overwrite system notification titles and content. This capability transforms the application into a vector for social engineering attacks or phishing campaigns against other users within the ecosystem. Since these notifications are typically perceived as official communications from the platform administrators, recipients are more likely to trust embedded links or textual instructions provided by the attacker. Consequently, this can facilitate credential harvesting, malware distribution, or further exploitation of downstream systems if the injected content directs victims to malicious external domains.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK technique T1078: Valid Accounts, as it requires initial authentication but exploits weak authorization logic rather than stolen credentials. The attack path involves reconnaissance through the unguarded list endpoint followed by exploitation of the missing access control on the edit function. This sequence demonstrates how seemingly minor misconfigurations in API endpoints can be chained to achieve significant malicious outcomes. The ability to modify system-wide templates effectively compromises the integrity and trustworthiness of the application's communication channels, which is a critical component for maintaining user confidence and operational security within enterprise environments.
Mitigation strategies must focus on implementing robust server-side authorization checks that validate the current user’s role or permissions against the specific resource being accessed before processing any modification requests. Developers should ensure that all administrative endpoints enforce strict Role-Based Access Control (RBAC) policies, verifying that only users with designated admin roles can interact with system configuration data such as message templates. Additionally, input validation and output encoding practices should be reinforced to mitigate potential cross-site scripting risks if the injected content is rendered without proper sanitization in client applications. Regular security audits of API endpoints are recommended to identify unguarded list functions or other areas where access controls may have been inadvertently omitted during development. Updating to a patched version that addresses these authorization flaws is essential for restoring the integrity of the application’s security posture and preventing unauthorized manipulation of system communications.