What is the CVSS score of CVE-2023-54339?

CVE-2023-54339 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.7%.

Which versions of PHP are affected by CVE-2023-54339?

Organizations using Webgrind 1.1 face critical risk from CVE-2023-54339, a OS command injection vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2023-54339?

Yes, a public proof-of-concept exploit is available for CVE-2023-54339. Prioritise patching immediately. EPSS: 0.7%.

How to fix or mitigate CVE-2023-54339?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Validate that input sanitization is in place for all user-controlled parameters.

PHP CVE-2023-54339

CRITICAL

OS Command Injection (CWE-78)

2026-01-13 disclosure@vulncheck.com

PHP Command Injection Webgrind

9.8

CVSS 3.1 · NVD

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 03, 2026 - 19:21 vuln.today

Public exploit code

CVE Published

Jan 13, 2026 - 23:16 nvd

CRITICAL 9.8

DescriptionCVE.org

Webgrind 1.1 contains a remote command execution vulnerability that allows unauthenticated attackers to inject OS commands via the dataFile parameter in index.php. Attackers can execute arbitrary system commands by manipulating the dataFile parameter, such as using payload '0%27%26calc.exe%26%27' to execute commands on the target system.

AnalysisAI

Webgrind 1.1 has unauthenticated command injection via the dataFile parameter in index.php. The profiling tool executes OS commands directly from URL parameters. PoC available.

Technical ContextAI

The dataFile parameter is passed to a system command without sanitization (CWE-78).

RemediationAI

Remove Webgrind from production servers. Use it only in local development environments.

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CVE-2023-54339 vulnerability details – vuln.today

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PHP CVE-2023-54339

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code