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Casdoor CVE-2026-91998

| EUVDEUVD-2026-78438 CRITICAL
Incorrect Authorization (CWE-863)
2026-09-15 VulnCheck GHSA-jvmw-g7rg-x26f
9.4
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.4 CRITICAL
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (VulnCheck) · only source for this CVE.

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

3
POC Analysis Generated
Sep 15, 2026 - 15:21 vuln.today
Analysis Generated
Sep 15, 2026 - 12:05 vuln.today
CVE Published
Sep 15, 2026 - 11:35 cve.org
CRITICAL 9.4

DescriptionCVE.org

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.

AnalysisAI

Cross-organization user administration takeover in Casdoor through 4.4.0 allows any holder of a single application's clientId and clientSecret to act on user accounts across all organizations. The flaw is an authorization bypass in the /api/mcp endpoint that exposes password salts, email addresses, and account creation/modification/deletion capabilities. …

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CVE-2026-90942 CRITICAL POC
9.3 Sep 14

We need answer JSON only. Need synthesize. Let's parse. CVE-2026-90942 Casdoor through 4.4.0 private key exposure. Need

CVE-2022-38638 CRITICAL POC
9.1 Sep 09

Casdoor v1.97.3 was discovered to contain an arbitrary file write vulnerability via the fullFilePath parameter at /api/u

CVE-2024-41657 HIGH POC
8.8 Aug 20

Casdoor is a UI-first Identity and Access Management (IAM) / Single-Sign-On (SSO) platform. Rated high severity (CVSS 8.

CVE-2022-44942 HIGH POC
8.1 Dec 07

Casdoor before v1.126.1 was discovered to contain an arbitrary file deletion vulnerability via the uploadFile function.

CVE-2023-34927 MEDIUM POC
6.5 Jun 22

Casdoor v1.331.0 and below was discovered to contain a Cross-Site Request Forgery (CSRF) in the endpoint /api/set-passwo

CVE-2024-41658 MEDIUM POC
6.1 Aug 20

Casdoor is a UI-first Identity and Access Management (IAM) / Single-Sign-On (SSO) platform. Rated medium severity (CVSS

CVE-2026-15630 CRITICAL
9.9 Jul 23

Cross-tenant privilege escalation in Casdoor allows a non-global organization admin in one tenant to delete, create, or

CVE-2026-6815 MEDIUM POC
5.9 May 11

Path traversal in Casdoor's Local File System storage provider allows authenticated administrators to write arbitrary fi

CVE-2026-9097 CRITICAL
9.8 May 28

Token revocation bypass in Casdoor identity management platform (versions 2.362.0 and earlier) allows remote unauthentic

CVE-2026-9094 CRITICAL
9.8 May 28

Cross-organization token exchange in Casdoor versions 2.362.0 and earlier allows remote unauthenticated attackers to esc

CVE-2026-9093 CRITICAL
9.8 May 28

SAML authentication bypass in Casdoor 2.362.0 and earlier allows remote unauthenticated attackers to authenticate as arb

CVE-2026-84423 MEDIUM POC
5.5 Sep 01

Unauthenticated arbitrary file upload in Casdoor's /api/upload-resource endpoint (controllers/resource.go) exposes all v

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CVE-2026-91998 vulnerability details – vuln.today

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