CVE-2026-108868
Received Received - Intake

JeecgBoot Missing Authorization in System Announcements

Publication date: 2026-10-11

Last updated on: 2026-10-11

Assigner: VulnCheck

Description
JeecgBoot through 3.9.5 contains a missing authorization vulnerability that allows any authenticated user to publish templated system announcements via POST /sys/api/sendBusTemplateAnnouncement. Low-privileged attackers can supply templateCode, toUser, and a forged fromUser to send notifications to arbitrary users through WebSocket, DingTalk, WeCom, Feishu and UniPush channels.

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Meta Information

Published
2026-10-11
Last Modified
2026-10-11
Generated
2026-10-11
AI Q&A
2026-10-11
EPSS Evaluated
N/A
NVD
CVE-2026-108868
EUVD
EUVD-2026-97042

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
jeecgboot JeecgBoot 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

JeecgBoot through version 3.9.5 has a missing authorization vulnerability in the POST /sys/api/sendBusTemplateAnnouncement endpoint. Any authenticated user can send system-wide announcements without proper permission checks. Attackers can forge the sender (fromUser) and specify recipients (toUser) to impersonate users and send messages through multiple channels like WebSocket, DingTalk, WeCom, Feishu, and UniPush.

Detection Guidance

Check for unauthorized POST requests to /sys/api/sendBusTemplateAnnouncement with forged fromUser or toUser fields. Monitor WebSocket, DingTalk, WeCom, Feishu, and UniPush channels for unexpected system announcements. Review logs for suspicious templateCode usage or message spoofing attempts.

Impact Analysis

Low-privileged attackers can send fake system announcements to any user, potentially tricking them into revealing sensitive information or performing actions. Messages sent to external platforms like DingTalk cannot be recalled once delivered. The vulnerability allows impersonation of system accounts, increasing the risk of phishing or social engineering attacks.

Compliance Impact

This vulnerability could potentially violate compliance with GDPR and HIPAA by enabling unauthorized users to send spoofed system announcements. Under GDPR, unauthorized data exposure or impersonation risks may lead to breaches of confidentiality. HIPAA requires strict access controls for protected health information; this flaw allows low-privileged users to send messages impersonating others, risking unauthorized data access or disclosure.

Mitigation Strategies

Upgrade JeecgBoot to a version beyond 3.9.5. Implement strict input validation for fromUser and toUser fields. Add authorization checks to ensure only authorized users can send system announcements. Disable or restrict access to the vulnerable endpoint if an update is not immediately possible.

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