What is the CVSS score of CVE-2025-40729?

CVE-2025-40729 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of PHP are affected by CVE-2025-40729?

Organizations using Customer Support System should be aware of moderate risk from CVE-2025-40729, a cross-site scripting vulnerability rated CVSS 6.1.

How to fix or mitigate CVE-2025-40729?

Within 30 days: Identify affected systems running Customer Support System and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

PHP CVE-2025-40729

EUVD-2025-18371 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-06-16 cve-coordination@incibe.es

PHP RCE XSS Customer Support System

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 21:59 euvd

EUVD-2025-18371

Analysis Generated

Mar 14, 2026 - 21:59 vuln.today

CVE Published

Jun 16, 2025 - 09:15 nvd

MEDIUM 6.1

DescriptionCVE.org

Reflected Cross-Site Scripting (XSS) in /customer_support/index.php in Customer Support System v1.0, which allows remote attackers to execute arbitrary code via the page parameter.

Analysis

Reflected Cross-Site Scripting (XSS) in /customer_support/index.php in Customer Support System v1.0, which allows remote attackers to execute arbitrary code via the page parameter.

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

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CVE-2025-40729 vulnerability details – vuln.today

Back

PHP CVE-2025-40729

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

Analysis

Technical ContextAI

RemediationAI

More from same product – last 7 days

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External POC / Exploit Code