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


- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 29 Oct 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-7vcm-wxx6-q65r

## What is CVE-2026-103485?

CVE-2026-103485 is a medium-severity vulnerability in hupe13 Extensions for Leaflet Map, published on 29 Oct 2026. 

### Official 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.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-103485?


## How do I fix CVE-2026-103485?

No fix has been published for CVE-2026-103485 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-103485 being exploited?

There is no known exploitation of CVE-2026-103485 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-103485 and fix it if it is affected.

What it is: CVE-2026-103485 is a medium-severity vulnerability in hupe13 Extensions for Leaflet Map, published on 29 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-103485 in the wild and no public exploit code.

Affected product: hupe13 Extensions for Leaflet Map. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-103485/ (Markdown: https://insights.sbomify.com/CVE-2026-103485/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-103485
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-103485
- OSV: https://osv.dev/vulnerability/CVE-2026-103485

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-103485/
Summaries are generated and may contain mistakes; the official description above is the record.