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.
Published: 2026-09-15
Score: 9.4 Critical
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 15 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
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.
Title Casdoor through 4.4.0 Cross-Organization User Administration via /api/mcp
First Time appeared Casbin
Casbin casdoor
Weaknesses CWE-863
CPEs cpe:2.3:a:casbin:casdoor:*:*:*:*:*:*:*:*
Vendors & Products Casbin
Casbin casdoor
References
Metrics cvssV3_1

{'score': 9.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-15T11:35:52.041Z

Reserved: 2026-09-15T11:11:13.312Z

Link: CVE-2026-91998

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-15T12:17:55.407

Modified: 2026-09-15T12:17:55.407

Link: CVE-2026-91998

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses