CVE-2026-108680 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows any authenticated user to send template notifications by calling POST /sys/api/sendTemplateAnnouncement. Low-privileged attackers can supply forged sender, recipients, title, and template parameters to deliver messages appearing to come from admin or system accounts.
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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-284 Improper Access Control. This flaw resides within the application's backend API endpoint responsible for sending template-based announcements or notifications. The core technical issue is that the POST /sys/api/sendTemplateAnnouncement route does not enforce sufficient authorization checks to verify whether the authenticated user has the privilege level required to initiate system-wide communications. In a properly secured enterprise application, such administrative functions should be restricted to users with specific roles, typically administrators or designated communication officers, rather than being accessible to any valid session token regardless of its associated permissions.
From an operational perspective, this missing authorization allows low-privileged attackers who have obtained valid credentials for the application to abuse the functionality. By crafting a malicious HTTP POST request and supplying forged parameters for sender identity, recipient lists, message titles, and template content, these actors can bypass intended restrictions. The most significant consequence of this flaw is the ability to impersonate high-level system accounts or administrators. Since the notification mechanism likely relies on backend logic that accepts user-supplied data without validating its source against a whitelist of authorized senders, attackers can manipulate the displayed sender information to appear as if the message originated from an official administrative account.
This capability facilitates sophisticated social engineering attacks and phishing campaigns within the organization's internal communication channels. Attackers can distribute malicious links, request sensitive information under false pretenses, or spread misinformation that appears authoritative due to its apparent origin. The trust users place in system-generated notifications makes this vector particularly dangerous for credential harvesting and initial access establishment if combined with other vulnerabilities. Furthermore, it undermines the integrity of official communications, potentially causing operational disruption or reputational damage depending on the content delivered.
To mitigate this vulnerability, immediate action is required to patch JeecgBoot to a version later than 3.9.5 where these authorization checks have been corrected. In environments where upgrading is not immediately feasible, administrators should implement network-level controls such as Web Application Firewalls (WAF) rules that restrict access to the /sys/api/sendTemplateAnnouncement endpoint exclusively from trusted internal sources or specific IP ranges associated with administrative interfaces. Additionally, implementing strict server-side validation for sender identity parameters and ensuring that notification templates are pre-defined rather than fully user-supplied can reduce the risk of impersonation. Regular security audits focusing on role-based access control (RBAC) implementation across all API endpoints are recommended to prevent similar misconfigurations in other parts of the application architecture aligned with ATT&CK techniques related to account manipulation and social engineering.