PatchSiren

PatchSiren cyber security CVE debrief

CVE-2023-4406 KC Group CVE debrief

CVE-2023-4406 is a reflected cross-site scripting (XSS) vulnerability in KC Group E-Commerce Software affecting versions through 2023-11-23. The issue is tracked by NVD with CWE-79 and a CVSS 3.1 score of 6.1 (medium). Because exploitation requires user interaction and can execute in a browser context, it is most important for internet-facing deployments that accept or reflect untrusted input. The vendor was reportedly contacted early about the disclosure but did not respond.

Vendor
KC Group
Product
E-Commerce Software
CVSS
MEDIUM 6.1
CISA KEV
Not listed in stored evidence
Original CVE published
2023-11-23
Original CVE updated
2026-05-21
Advisory published
2023-11-23
Advisory updated
2026-05-21

Who should care

Security teams, application owners, and developers responsible for KC Group E-Commerce Software deployments—especially any site or portal that reflects request data into HTML responses.

Technical summary

NVD lists the weakness as CWE-79 (Improper Neutralization of Input During Web Page Generation). The recorded CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N, indicating network reachability, low attack complexity, no privileges required, and user interaction required. The affected CPE is kc_group_e-commerce_software_project:kc_group_e-commerce_software with a vulnerable version range ending at 2023-11-23. The core defensive concern is unescaped or insufficiently encoded user-controlled content being returned to a web page, enabling script execution in a victim’s browser.

Defensive priority

Medium priority. Remediate promptly if the product is exposed to users, handles untrusted parameters, or is used in workflows where a malicious link could reach authenticated users.

Recommended defensive actions

  • Identify all KC Group E-Commerce Software instances and confirm whether they are within the affected range through 2023-11-23.
  • Apply the vendor fix or upgrade to a non-vulnerable release if one is available.
  • Review server-side templates and response handling for proper output encoding and input neutralization on every page that reflects request data.
  • Validate any parameters, form fields, and query strings that are rendered back into HTML, JavaScript, or attributes.
  • Use browser-side and server-side security testing to confirm that reflected input is not executed as script.
  • Warn users and admins to avoid clicking untrusted links into affected application pages until remediation is complete.

Evidence notes

The description and NVD metadata identify reflected XSS. NVD lists the affected product, the end of the vulnerable range as 2023-11-23, and the CVSS vector. The supplied references include official NVD/CVE records and two USOM links; one provided reference is malformed/broken in the source corpus and should not be relied on as-is.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-4406 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-4406

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-4406 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-4406

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.