CVE-2026-84423
Casdoor upload-resource API resource.go missing authentication
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 1, 2026
- Updated
- Sep 3, 2026
- Reserved
- Sep 1, 2026
Description
A vulnerability has been found in Casdoor up to 4.0.0. This affects an unknown function of the file controllers/resource.go of the component upload-resource API. Such manipulation leads to missing authentication. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor deleted the GitHub issue for this vulnerability without any explanation. Afterwards the vendor was contacted early about this disclosure via email but did not respond in any way.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Casdoorn/a |
|
References
- VDB-397791 | Casdoor upload-resource API resource.go missing authenticationvdb-entry
- VDB-397791 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-84423 | CVE Analysis and Reportthird-party-advisory
- Submit #883037 | casdoor commit 0585ecf Missing Authorizationthird-party-advisory
- https://github.com/casdoor/casdoor/issues/5617issue-tracking
- https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resourceexploit
- https://github.com/casdoor/casdoor/product
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