JeeSite 5.11.0 through 5.19.1 IDOR in AI CMS Chat Module

Advisories

JeeSite 5.11.0 through 5.19.1 IDOR in AI CMS Chat Module

Severity: low
Date: 10/29/2026
Affecting: JeeSite >= 5.11.0, <= 5.19.1
CVE: CVE-2026-119048
CWE: CWE-639 Authorization Bypass Through User-Controlled Key
CVSS: 2.3
CVSS V4 Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References: GitHub Issue #43
https://github.com/thinkgem/jeesite5
https://github.com/thinkgem/jeesite5/commit/cbc5ba7a37fd93f38c46ef656bd31442fe6f8015
https://github.com/thinkgem/jeesite5/blob/5b5e2cf0adc45a1abe33d0f4ca149590d149b82d/modules/ai/ai-cms/src/main/java/com/jeesite/modules/ai/cms/service/CacheChatMemoryRepository.java#L59-L62
https://github.com/thinkgem/jeesite5/blob/5b5e2cf0adc45a1abe33d0f4ca149590d149b82d/modules/ai/ai-cms/src/main/java/com/jeesite/modules/ai/cms/service/AiCmsChatService.java#L111-L116
https://hackmd.io/@hieund/jeesite5-ai-cms-chat-conversation-idor
Credit: hieuPenguinnn, ThinkGem
Description: JeeSite 5.11.0 through 5.19.1 contains an insecure direct object reference vulnerability in the AI CMS chat module that allows authenticated users to access other users' conversations due to missing and reversed ownership checks. Attackers who know or derive a victim's conversation id can call /a/cms/chat/message, /a/cms/chat/delete, or /a/cms/chat/completions to read, delete, or append to the victim's AI chat transcripts.

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