Casdoor through 4.4.0 Cross-Organization User Administration via /api/mcp
Published Sep 15, 2026
9.4
CRITICALCVSS 4.0
EPSS 0.59%
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.
Affected products
-
- Version 0StatusaffectedConstraints<=4.4.0
- Version
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
1 other source (NVD) ▾
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Sep 17, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.59% (0.00592) | 46.45th | v5 (v2026.06.15) |
| Sep 16, 2026 | 0.42% (0.00417) | 35.45th | v5 (v2026.06.15) |
References (6)
- https://github.com/casdoor/casdoor product
- https://github.com/casdoor/casdoor/blob/v4.4.0/authz/authz.go#L174-L176 technical-description
- https://github.com/casdoor/casdoor/blob/v4.4.0/mcpself/user.go technical-description
- https://github.com/casdoor/casdoor/blob/v4.4.0/routers/base.go#L122-L154 technical-description
- https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-2-application-credential-authorization-bypass-in-apimcp-enables-unrestricted-cross-organization-user-administration third-party-advisoryexploit
- https://www.vulncheck.com/advisories/casdoor-through-4.4.0-cross-organization-user-administration-via-api-mcp third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/casdoor/casdoor | product | |
| https://github.com/casdoor/casdoor/blob/v4.4.0/authz/authz.go#L174-L176 | technical-description | |
| https://github.com/casdoor/casdoor/blob/v4.4.0/mcpself/user.go | technical-description | |
| https://github.com/casdoor/casdoor/blob/v4.4.0/routers/base.go#L122-L154 | technical-description | |
| https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-2-application-credential-authorization-bypass-in-apimcp-enables-unrestricted-cross-organization-user-administration | third-party-advisoryexploit | |
| https://www.vulncheck.com/advisories/casdoor-through-4.4.0-cross-organization-user-administration-via-api-mcp | third-party-advisory |
Change history (0)
No recorded changes yet.