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Kodexplorer CVE-2023-6850

CRITICAL
Unrestricted Upload of File with Dangerous Type (CWE-434)
2023-12-16 cna@vuldb.com
9.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V5 - File Handling File type validation, storage isolation
MITRE ATT&CK

2 techniques across 2 tactics: Command and Control, Persistence

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.8% exploitation probability (EPSS)

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AnalysisAI

A vulnerability was found in kalcaddle KodExplorer up to 4.51.03. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Unrestricted File Upload vulnerability could allow attackers to upload malicious files that can be executed on the server.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. A vulnerability was found in kalcaddle KodExplorer up to 4.51.03. It has been declared as critical. This vulnerability affects unknown code of the file /index.php?pluginApp/to/yzOffice/getFile of the component API Endpoint Handler. The manipulation of the argument path/file leads to unrestricted upload. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 4.52.01 is able to address this issue. The patch is identified as 5cf233f7556b442100cf67b5e92d57ceabb126c6. It is recommended to upgrade the affected component. VDB-248218 is the identifier assigned to this vulnerability. Affected products include: Kodcloud Kodexplorer. Version information: up to 4.51.03..

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

A vulnerability was found in kalcaddle KodExplorer up to 4.51.03. It has been declared as critical. This vulnerability affects unknown code of the file /index.php?pluginApp/to/yzOffice/getFile of the component API Endpoint Handler. The manipulation of the argument path/file leads to unrestricted upload. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 4.52.01 is able to address this issue. The patch is identified as 5cf233f7556b442100cf67b5e92d57ceabb126c6. It is recommended to upgrade the affected component. VDB-248218 is the identifier assigned to this vulnerability.

Threat Intelligence Overview

EPSS Score
0.8%
Top 46% exploitable
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.8%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.

Affected Products (CPE)NVD

cpe:2.3:a:kodcloud:kodexplorer:*:*:*:*:*:*:*:*
CVE-2023-49489 MEDIUM POC
6.1 Dec 19

Reflective Cross Site Scripting (XSS) vulnerability in KodExplorer version 4.51, allows attackers to obtain sensitive in

CVE-2023-37153 MEDIUM POC
6.1 Jul 10

KodExplorer 4.51 contains a Cross-Site Scripting (XSS) vulnerability in the Description box of the Light App creation fe

CVE-2023-6853 CRITICAL
9.8 Dec 16

A vulnerability classified as critical was found in kalcaddle KodExplorer up to 4.51.03. Rated critical severity (CVSS 9

CVE-2023-6852 CRITICAL
9.8 Dec 16

A vulnerability classified as critical has been found in kalcaddle KodExplorer up to 4.51.03. Rated critical severity (C

CVE-2023-6851 CRITICAL
9.8 Dec 16

A vulnerability was found in kalcaddle KodExplorer up to 4.51.03. Rated critical severity (CVSS 9.8), this vulnerability

CVE-2026-6568 MEDIUM POC
5.5 Apr 19

Path traversal in kodcloud KodExplorer 4.52 and earlier allows unauthenticated remote attackers to access unauthorized f

CVE-2025-34504 MEDIUM POC
5.3 Dec 11

Open redirect in KodExplorer 4.52 allows unauthenticated attackers to craft URLs that redirect users to arbitrary extern

CVE-2022-46154 HIGH
7.5 Dec 06

Kodexplorer is a chinese language web based file manager and browser based code editor. Rated high severity (CVSS 7.5),

CVE-2026-104081 HIGH
7.2 Oct 09

Path traversal in KodExplorer before 4.55 lets an authenticated low-privileged user bypass the archive-extraction saniti

CVE-2026-6569 MEDIUM
6.9 Apr 19

Improper authentication in kodcloud KodExplorer versions up to 4.52 allows unauthenticated remote attackers to bypass ac

CVE-2026-6572 LOW POC
2.9 Apr 19

Improper authorization in Collabora KodExplorer up to version 4.52 allows remote unauthenticated attackers to bypass aut

CVE-2026-6571 LOW POC
2.1 Apr 19

Kodcloud KodExplorer up to version 4.52 contains an authorization bypass vulnerability in the roleGroupAction function t

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