What is CVE-2025-40729?

CVE-2025-40729 is a medium-severity vulnerability in Customer Support System, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-06-16.

How severe is CVE-2025-40729?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Customer Support System

CVE-2025-40729

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2025-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Customer Support System — versions all versions
Oretnom23 Customer Support System — versions 1.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-customer-su… (Third Party Advisory)

Frequently asked questions

What is CVE-2025-40729?: CVE-2025-40729 is a medium-severity vulnerability in Customer Support System, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-06-16.
How severe is CVE-2025-40729?: Medium severity. CVSS v3 base score is 6.1 out of 10.