CVE-2026-84423

HIGH 7.3

Casdoor upload-resource API resource.go missing authentication

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306 CWE-287
Vendor	n/a
Product	casdoor
Published	Sep 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / Casdoor

4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/397791 vuldb.com: https://vuldb.com/vuln/397791/cti vuldb.com: https://vuldb.com/cve/CVE-2026-84423 vuldb.com: https://vuldb.com/submit/883037 github.com: https://github.com/casdoor/casdoor/issues/5617 github.com: https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resource github.com: https://github.com/casdoor/casdoor/

Credits

🔍 geochen (VulDB User) VulDB CNA Team