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light0011 CMS CVE-2026-86305

| EUVDEUVD-2026-72376 MEDIUM
Unrestricted Upload of File with Dangerous Type (CWE-434)
2026-09-07 VulDB GHSA-56x5-c934-mjjc
PHP File Upload Cms Light0011
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 PHP webshell achieves full RCE with scope change; C/I/A all High.

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

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

Lifecycle Timeline

3
Analysis Generated
Sep 07, 2026 - 13:39 vuln.today
CVSS changed
Sep 07, 2026 - 13:23 NVD
6.9 (MEDIUM) 5.5 (MEDIUM)
CVE Published
Sep 07, 2026 - 12:45 cve.org
MEDIUM 5.5

DescriptionCVE.org

A security flaw has been discovered in light0011 cms c774dce31c6df0055568a8d5c53d964d99be199d/f72cf46f601efb2a0618c3814cc2f61380b38930. Affected by this issue is the function Upload::upload of the file ThinkPHP/Library/Think/Upload.class.php. Performing a manipulation results in unrestricted upload. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. This product adopts a rolling release strategy to maintain continuous delivery. Therefore, version details for affected or updated releases cannot be specified. The project was informed of the problem early through an issue report but has not responded yet.

AnalysisAI

Unrestricted file upload in light0011 CMS allows unauthenticated remote attackers to upload arbitrary file types - including PHP webshells - via the Upload::upload function in the ThinkPHP-based CMS. The affected code is confirmed at commits c774dce and f72cf46 in the light0011/cms GitHub repository. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation No special authentication is required per the CVSS 4.0 PR:N vector - exploitation is unauthenticated. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms unauthenticated, low-complexity, network-accessible exploitation with no user interaction - the worst-case access conditions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch has been identified at time of analysis; the project maintainer has not responded to the disclosure via GitHub issue. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-86305 vulnerability details – vuln.today
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