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Kodexplorer EUVDEUVD-2026-23700

| CVE-2026-6571 LOW
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-04-19 VulDB GHSA-p2wp-hfcj-f5jm
2.1
CVSS 4.0 · Vendor: VulDB
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Recon
    Obtain valid user credentials
  2. Delivery
    Authenticate to KodExplorer
  3. Exploit
    Send crafted roleGroupAction request
  4. Install
    Manipulate group_role parameter
  5. C2
    Bypass authorization check
  6. Execute
    Escalate to admin role
  7. Impact
    Execute privileged operations

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Object-level authorization, IDOR prevention
Exploitation Conditions

Exploitation requires an authenticated user account with at least basic login credentials-the vulnerability cannot be exploited by unauthenticated remote attackers. The attack targets the roleGroupAction function specifically when processing group_role parameter manipulation, meaning the vulnerable endpoint must be accessible and the application must be using the standard role-based access control system. No explicit non-default configuration is required; default KodExplorer installations with user accounts enabled are vulnerable. The limiting factors are: (1) authentication requirement (PR:L in CVSS)-attacker must possess valid user credentials or have previously compromised a low-privilege account; (2) the vulnerability is confined to role group assignment operations and does not extend to other administrative functions without role escalation; (3) exploitation requires the web application to be actively processing role management requests (standard in multi-user or shared deployments but potentially limited in single-user instances).

Impact

The risk profile presents a moderate but concrete threat requiring immediate attention. The CVSS 6.3 score with AV:N/AC:L reflects network-accessible exploitation with low attack complexity, but the requirement for PR:L (authenticated user privileges) significantly limits the immediate attack surface-this is not an unauthenticated remote code execution scenario. However, the E:P (exploit proof-of-concept exists) rating and public availability of working exploit code substantially elevate practical exploitation likelihood compared to purely theoretical high-CVSS vulnerabilities. The vendor's non-response to early disclosure is a critical signal: organizations cannot rely on official patches and must implement compensating controls immediately. The authorization bypass nature (CWE-639) typically allows rapid privilege escalation once initial authentication is obtained-a low-complexity pivot from standard user to administrative roles. Notably, KEV status is not confirmed in the provided data, but public exploit availability combined with low AC and vendor abandonment suggest realistic near-term exploitation. Organizations with public-facing KodExplorer instances or multi-user deployments should treat this as a priority, whereas isolated single-user installations face lower immediate risk.

Exploit ScenarioDerived

An authenticated regular user logs into a KodExplorer instance with standard file management permissions. The attacker crafts a malicious HTTP request to the roleGroupAction function, manipulating the group_role parameter to assign themselves to an administrative role group. Due to insufficient authorization checks, the application processes this request and elevates the user's privileges without proper validation. The attacker can now access administrative functions, modify system settings, and potentially extract sensitive data or establish persistence.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Apr 19, 2026

Kodcloud KodExplorer up to version 4.52 contains an authorization bypass vulnerability in the roleGroupAction function that allows authenticated remote attackers to manipulate the group_role parameter and gain unauthorized access to sensitive information and system modification capabilities. The vulnerability has a CVSS score of 6.3 with public exploit code available, and the vendor has not responded to early disclosure notifications, leaving deployed instances without official patching options.

RemediationAI

Immediate action: Upgrade KodExplorer to a version newer than 4.52 if such a version has been released post-disclosure (verify directly from Kodcloud's official repository, as no patched version is confirmed in provided data). If no official patch is available, implement immediate compensating controls: (1) Restrict access to the /app/controller/systemRole.class.php endpoint and role management interfaces using web application firewall (WAF) rules or reverse proxy authentication-this prevents normal users from reaching the vulnerable function while maintaining administrative access through separate controls; (2) Implement strict input validation on all group_role parameters at the application level by adding manual verification logic if you have source code access, rejecting any group_role modifications from non-administrative API contexts; (3) Enable comprehensive audit logging for all role assignment changes and cross-validate actual role memberships against intended configurations weekly; (4) Apply principle of least privilege by disabling user role self-modification features entirely in the application configuration if such an option exists. Trade-offs: WAF blocking of role management endpoints may affect legitimate administrative workflow efficiency-establish a separate administrative access channel (e.g., VPN or IP-restricted admin portal). If source modification is performed, test thoroughly in staging as it may conflict with future updates.

Affected VersionsENISA

KodExplorer 4.25
KodExplorer 4.41
KodExplorer 4.17
KodExplorer 4.0
KodExplorer 4.14
KodExplorer 4.47
KodExplorer 4.15
KodExplorer 4.21
KodExplorer 4.52
KodExplorer 4.44
KodExplorer 4.42
KodExplorer 4.50
KodExplorer 4.37
KodExplorer 4.28
KodExplorer 4.35
KodExplorer 4.19
KodExplorer 4.51
KodExplorer 4.29
KodExplorer 4.31
KodExplorer 4.8
KodExplorer 4.9
KodExplorer 4.7
KodExplorer 4.43
KodExplorer 4.36
KodExplorer 4.16
KodExplorer 4.34
KodExplorer 4.3
KodExplorer 4.1
KodExplorer 4.49
KodExplorer 4.18
KodExplorer 4.6
KodExplorer 4.12
KodExplorer 4.24
KodExplorer 4.22
KodExplorer 4.2
KodExplorer 4.40
KodExplorer 4.27
KodExplorer 4.32
KodExplorer 4.46
KodExplorer 4.11
KodExplorer 4.13
KodExplorer 4.48
KodExplorer 4.10
KodExplorer 4.20
KodExplorer 4.30
KodExplorer 4.23
KodExplorer 4.33
KodExplorer 4.4
KodExplorer 4.38
KodExplorer 4.26
KodExplorer 4.45
KodExplorer 4.39
KodExplorer 4.5

Affected Packages

euvd kodexplorer no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

Technical ContextAI · show details

The vulnerability exists in the role-based access control (RBAC) implementation of KodExplorer's system role management module. Specifically, the roleGroupAction function in /app/controller/systemRole.class.php fails to properly validate authorization checks on the group_role parameter before processing role assignment and modification operations. This is classified as CWE-639 (Authorization Bypass Through User-Controlled Key), a fundamental access control flaw where user-supplied input directly influences authorization decisions without adequate validation. The PHP-based web application uses role groups to segment administrative and user permissions, making this bypass particularly impactful for lateral privilege escalation and administrative function hijacking.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (VulDB) PRIMARY 2.1 LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Primary rating from Vendor (VulDB) · only source for this CVE.

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
Low
Vulnerable system: Integrity
Low
Vulnerable system: Availability
Low
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

5
Severity Changed
Apr 29, 2026 - 01:12 NVD
MEDIUM LOW
CVSS changed
Apr 29, 2026 - 01:12 NVD
5.3 (MEDIUM) 2.1 (LOW)
PoC Detected
Apr 29, 2026 - 01:00 vuln.today
Public exploit code
CVSS changed
Apr 19, 2026 - 12:22 NVD
6.3 (MEDIUM) 5.3 (MEDIUM)
CVE Published
Apr 19, 2026 - 12:00 nvd
LOW 2.1

DescriptionCVE.org

A weakness has been identified in kodcloud KodExplorer up to 4.52. Affected by this vulnerability is the function roleGroupAction of the file /app/controller/systemRole.class.php. Executing a manipulation of the argument group_role can lead to authorization bypass. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Threat Intelligence Overview

EPSS Score
0.0%
Top 90% exploitable
Exploit
POC
Public exploit code exists
Social Media
1
Sightings
Data Quality
6 sources
Confidence: High

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 LOW
CISA KEV No
Public POC Yes
EPSS 0.0%
Patch available No
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
Poc
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Low
Technical Impact
Partial

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +10
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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