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shiroiAdmin CVE-2026-15488

| EUVDEUVD-2026-43210 MEDIUM
Improper Access Control (CWE-284)
2026-07-12 cna@vuldb.com GHSA-6jr9-24jm-2547
Authentication Bypass File Upload PHP
5.5
CVSS 4.0 · Vendor: vuldb
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Severity by source

Vendor (vuldb) PRIMARY
5.5 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/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
vuln.today AI
10.0 CRITICAL

Unauthenticated network upload of arbitrary PHP files in a web-accessible PHP app classically enables webshell RCE with full C/I/A impact and scope change.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (vuldb).

CVSS VectorVendor: vuldb

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/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

1
Analysis Generated
Jul 12, 2026 - 09:30 vuln.today

DescriptionCVE.org

A vulnerability was determined in hcr707305003 shiroiAdmin 1.1/1.3. Affected is the function FileController::upload of the file app/common/controller/FileController.php. Executing a manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 1.4 is able to address this issue. This patch is called 3ecde28ea8a20a3840dbfefd6d6863ee79a83e70. It is suggested to upgrade the affected component. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Unrestricted file upload in shiroiAdmin versions 1.1 and 1.3 (PHP admin panel by hcr707305003) exposes the FileController::upload function to unauthenticated remote exploitation, enabling attackers to upload arbitrary files - including PHP webshells - to the server without authentication. A public exploit has been disclosed (CVSS 4.0 E:P), and the vendor did not respond to coordinated disclosure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed upload endpoint
Delivery
Send unauthenticated HTTP multipart request
Exploit
Bypass CWE-284 access control
Execution
Upload PHP webshell to web-accessible path
Impact
Execute arbitrary OS commands via webshell
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Vulnerability AssessmentAI

Exploitation No special authentication or privilege is required - the CVSS 4.0 vector confirms PR:N (no privileges), AV:N (network), AC:L (low complexity), and UI:N (no user interaction). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 base score of 5.5 (VC:L/VI:L/VA:L) appears to underestimate real-world impact for this class of vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An unauthenticated remote attacker sends a crafted multipart HTTP POST request to the exposed upload endpoint, bypassing the application's access control gate due to the CWE-284 flaw. The attacker supplies a PHP webshell disguised or unrestricted by file type, which is written to a web-accessible directory on the server. …
Remediation Upgrade to shiroiAdmin version 1.4 immediately; this release contains the remediation commit 3ecde28ea8a20a3840dbfefd6d6863ee79a83e70, available at https://github.com/hcr707305003/shiroiAdmin/commit/3ecde28ea8a20a3840dbfefd6d6863ee79a83e70. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-15488 vulnerability details – vuln.today
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