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CVE-2026-91998— Casdoor through 4.4.0 Cross-Organization User Administration via /api/mcp

Quick assessment

Affected
casdoor casdoor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Casdoor 4.4.0 及之前版本中存在一个授权绕过漏洞，位于 端点。该漏洞允许攻击者凭借任意应用程序的 和 ，跨所有组织获得不受限制的用户管理权限。具体而言，攻击者可以通过提供来自单一应用程序的合法凭证，在任意组织内执行以下操作： 枚举用户记录，包括密码盐值（password salts）和电子邮件地址； 创建管理员账户； 修改现有用户信息； 删除用户。

CVSS 9.9 · Critical
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I. Basic Information for CVE-2026-91998

Vulnerability Information
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Vulnerability Title
Casdoor through 4.4.0 Cross-Organization User Administration via /api/mcp
Source: CVE Program / CVE List V5
Vulnerability Description
Casdoor through 4.4.0 contains an authorization bypass vulnerability in the /api/mcp endpoint that allows attackers with any application's clientId and clientSecret to gain unrestricted access to user administration across all organizations. Attackers can enumerate user records including password salts and email addresses, create administrator accounts, modify existing users, and delete them in any organization by supplying legitimate credentials from a single application.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
casdoor casdoor 0 ~ 4.4.0 -

II. Public POCs for CVE-2026-91998

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III. Intelligence Information for CVE-2026-91998

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Vendor Advisories for CVE-2026-91998 (1)

Proof of Concept for CVE-2026-91998 (1)

Vendor Pages for CVE-2026-91998 (1)

Other References for CVE-2026-91998 (3)

IV. Related Vulnerabilities

Same product: casdoor
Same vendor: casdoor
Same weakness: CWE-863

V. Comments for CVE-2026-91998

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