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CVE-2026-84423

Casdoor upload-resource API resource.go missing authentication

HIGH
7.3
CVSS Score
Published: September 1, 2026 at 10:45 PM UTC
Updated: September 3, 2026 at 04:18 PM UTC
1 product affected across 1 vendorCasdoor

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Severity
HIGH7.3
Exploit prediction
EPSS 0.7%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

VDB Entry
Source: cverecord
https://vuldb.com/vuln/397791
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/397791/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-84423
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/883037
Issue Tracking
Source: cverecord
https://github.com/casdoor/casdoor/issues/5617
Exploit
Source: cverecord
https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-1-unauthenticated-arbitrary-file-upload-via-apiupload-resource
Product
Source: cverecord
https://github.com/casdoor/casdoor/

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-306CWE-287

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