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Findings

Vulnerability · CVE-2025-39413

Missing Authorization vulnerability in David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap simple-sitemap.This issue affects Simple Sitemap – Create a Responsive HTML Sit

Published Apr 30, 2025 · corrected/updated Apr 28, 2026 · David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap · evidence confidence high

Missing Authorization vulnerability in David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap simple-sitemap.This issue affects Simple Sitemap – Create a Responsive HTML Sitemap: from n/a through <= 3.6.0.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2025-39413 is a medium public vulnerability record for David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap 0 ≤3.6.0 (0 ≤3.6.0). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 4.3, EPSS 39.0%. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, euvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 30, 2025 · EUVD

    Detected

    Missing Authorization vulnerability in David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap simple-sitemap.This issue affects Simple Sitemap – Create a Responsive HTML Sitemap: from n/a through <= 3.6.0.

  2. Apr 28, 2026 · EUVD

    Updated

    Missing Authorization vulnerability in David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap simple-sitemap.This issue affects Simple Sitemap – Create a Responsive HTML Sitemap: from n/a through <= 3.6.0.

Affected

  • vendor David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap 0 ≤3.6.00 ≤3.6.0

Sources

  • CVE.orgVulnerability recordCVE-2025-39413

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-12768

    Missing Authorization vulnerability in David Gwyer Simple Sitemap – Create a Responsive HTML Sitemap simple-sitemap.This issue affects Simple Sitemap – Create a Responsive HTML Sitemap: from n/a through <= 3.6.0.

    euvd.enisa.europa.eu

References