CVE-2026-108642 in JeecgBoot
Summary
by MITRE • 10/11/2026
JeecgBoot through 3.9.5 contains a missing authorization vulnerability in SysAnnouncementSendController that allows authenticated users to modify other users' message delivery records. Attackers can obtain delivery ids from GET /sys/sysAnnouncementSend/list and submit edit requests that overwrite read flags, recipient ids, or linked announcements to hide messages from recipients.
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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 within the SysAnnouncementSendController module. This flaw is classified as an Insecure Direct Object Reference (IDOR), which falls under CWE-639, indicating that the application fails to properly verify whether the authenticated user has permission to perform actions on specific data objects identified by their unique identifiers. The core technical issue lies in the lack of server-side validation for ownership or administrative privileges when processing requests related to message delivery records. Consequently, any user who can successfully authenticate to the system is granted excessive capabilities that extend beyond their intended role boundaries, allowing them to interact with resources belonging to other users without proper authorization checks.
The operational impact of this vulnerability is significant because it enables authenticated attackers to manipulate the state of internal communication systems. By leveraging a GET request to /sys/sysAnnouncementSend/list, an attacker can enumerate valid delivery identifiers associated with various recipients within the organization. Armed with these IDs, the attacker can submit edit requests that overwrite critical fields such as read flags, recipient assignments, or linked announcement content. This capability allows for sophisticated social engineering attacks where messages intended for specific individuals are marked as already read by others, effectively hiding them from their true targets. Furthermore, altering recipient IDs could redirect sensitive information to unintended parties, leading to potential data leakage and a breach of confidentiality requirements mandated by various industry standards.
From an offensive security perspective, this vulnerability aligns with the MITRE ATT&CK technique T1078, specifically Valid Accounts, as it relies on legitimate credentials to abuse system functionality rather than exploiting software bugs in authentication logic. It also relates to T1534, Internal Spearphishing, since modifying delivery records can be used to conceal malicious communications from security monitoring tools or targeted employees. The ability to hide messages undermines the integrity of audit trails and incident response capabilities, as administrators may fail to detect ongoing threats if those notifications are suppressed through this manipulation technique. This lack of visibility creates a blind spot that adversaries can exploit for persistence or further lateral movement within the network environment.
Mitigation strategies must focus on implementing robust authorization checks at the controller level before any data modification occurs. Developers should ensure that every request modifying announcement delivery records verifies that the requesting user is either the intended recipient, an administrator with explicit permission to manage all messages, or possesses a specific role-based access control right tied to the target resource ID. Additionally, adopting a principle of least privilege ensures that users only have access to data directly relevant to their current session and responsibilities. Input validation should also be strengthened to prevent enumeration attacks by limiting the scope of list queries based on user context rather than returning all available records. Regular security audits and penetration testing focusing on broken object level authorization are recommended to identify similar flaws across other modules within the JeecgBoot framework before they can be exploited in production environments.