Which versions of PHP are affected by EUVD-2026-14239?

Organizations using PbootCMS should be aware of moderate risk from CVE-2026-4509 rated CVSS 6.3. Exploitation could compromise the security of affected deployments.

Is there a public PoC exploit available for EUVD-2026-14239?

Yes, a public proof-of-concept exploit is available for EUVD-2026-14239. Prioritise patching immediately. EPSS: 0.0%.

PHP EUVD-2026-14239

Q: What is the CVSS score of EUVD-2026-14239?

EUVD-2026-14239 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: 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/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. EPSS exploitation probability: 0.0%.

| CVE-2026-4509 LOW

Incomplete List of Disallowed Inputs (CWE-184)

2026-03-21 VulDB

PHP File Upload

2.1

CVSS 4.0

CVSS VectorNVD

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/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

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

5.3 (MEDIUM) 2.1 (LOW)

CVSS changed

Apr 24, 2026 - 16:37 NVD

6.3 (MEDIUM) 5.3 (MEDIUM)

PoC Detected

Mar 23, 2026 - 14:31 vuln.today

Public exploit code

EUVD ID Assigned

Mar 21, 2026 - 06:15 euvd

EUVD-2026-14239

Analysis Generated

Mar 21, 2026 - 06:15 vuln.today

CVE Published

Mar 21, 2026 - 06:02 nvd

MEDIUM 6.3

DescriptionNVD

A security flaw has been discovered in PbootCMS up to 3.2.12. This affects an unknown function of the file core/function/file.php of the component File Upload. The manipulation of the argument black results in incomplete blacklist. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

AnalysisAI

PbootCMS versions up to 3.2.12 contain an incomplete blacklist bypass vulnerability in the file upload functionality (core/function/file.php) that allows authenticated attackers to upload dangerous files by manipulating the blacklist parameter. An attacker with login credentials can bypass file type restrictions to upload arbitrary files, potentially achieving remote code execution or other malicious outcomes. …

RemediationAI

Within 30 days: Identify affected systems running PbootCMS and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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EUVD-2026-14239 vulnerability details – vuln.today

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