CVE-2026-84423: Missing Authentication in Casdoor
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.
CVSS v4.0
Score 6.9medium
Affected software
Casdoor
cpe:2.3:a:casdoor:casdoor:*:*:*:*:*:*:*:*AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Casdoor up to version 4.0.0 and involves missing authentication checks in an unknown function of the upload-resource API located in controllers/resource.go. The lack of authentication allows remote attackers to manipulate the API without proper authorization. The exploit code has been publicly disclosed, and the vendor has not issued any response or patch, nor is there an official remediation level stated.
Potential Impact
The vulnerability enables unauthenticated remote attackers to access or manipulate the upload-resource API, potentially leading to unauthorized actions within the affected Casdoor instance. The CVSS 4.0 score of 6.9 reflects a medium severity with network attack vector, no privileges required, and no user interaction needed. The impact includes low confidentiality, integrity, and availability impacts.
Mitigation Recommendations
No official fix or patch is currently available for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Due to the vendor's lack of response and absence of a patch, users should consider implementing compensating controls such as restricting access to the upload-resource API or deploying additional authentication mechanisms until an official fix is released.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-01T17:55:13.244Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a975745acd9273b494e0756
Added to database: 09/01/2026, 22:52:53 UTC
Last enriched: 09/07/2026, 13:04:08 UTC
Last updated: 10/16/2026, 18:48:25 UTC
Views: 83
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