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.

Attack Vector Network

Attack Complexity High

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
thinkgem JeeSite unaffected
Version Status Constraints
5.11.0 affected ≤ 5.19.1

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Jeesite Subscribe
Jeesite Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/thinkgem/jeesite5 cve-icon cve-icon
https://github.com/thinkgem/jeesite5/blob/5b5e2cf0adc45a1abe33d0f4ca149590d149b82d/modules/ai/ai-cms/src/main/java/com/jeesite/modules/ai/cms/service/AiCmsChatService.java#L111-L116 cve-icon cve-icon
https://github.com/thinkgem/jeesite5/blob/5b5e2cf0adc45a1abe33d0f4ca149590d149b82d/modules/ai/ai-cms/src/main/java/com/jeesite/modules/ai/cms/service/CacheChatMemoryRepository.java#L59-L62 cve-icon cve-icon
https://github.com/thinkgem/jeesite5/commit/cbc5ba7a37fd93f38c46ef656bd31442fe6f8015 cve-icon cve-icon
https://github.com/thinkgem/jeesite5/issues/43 cve-icon cve-icon
https://hackmd.io/@hieund/jeesite5-ai-cms-chat-conversation-idor cve-icon cve-icon
https://www.vulncheck.com/advisories/jeesite-5.11.0-through-5.19.1-idor-in-ai-cms-chat-module cve-icon cve-icon
History

Thu, 29 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
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.
Title JeeSite 5.11.0 through 5.19.1 IDOR in AI CMS Chat Module
First Time appeared Jeesite
Jeesite jeesite
Weaknesses CWE-639
CPEs cpe:2.3:a:jeesite:jeesite:*:*:*:*:*:*:*:*
Vendors & Products Jeesite
Jeesite jeesite
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.3, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-29T13:08:50.215Z

Reserved: 2026-10-29T11:51:50.043Z

Link: CVE-2026-119048

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-29T14:17:51.650

Modified: 2026-10-29T14:17:51.777

Link: CVE-2026-119048

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses