# CVE-2026-5451: hupe13 Extensions for Leaflet Map Stored XSS in elevation-track shortcode

Source: https://junglewise.ai/threats/cve-2026-5451-hupe13-extensions-for-leaflet-map-stored-xss-in-elevation-track  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-5451 · Severity: medium · CVSS 6.4 · Published 2026-04-08

The Extensions for Leaflet Map plugin for WordPress, which adds advanced mapping features like elevation charts to websites, is vulnerable to a security flaw. Authenticated users with at least 'Contributor' permissions can inject malicious scripts into pages via a specific map feature. These scripts will then execute in the browser of any visitor who views the affected page, potentially leading to unauthorized actions or data theft.

Technologies: [Hupe13 Extensions for Leaflet Map](https://junglewise.ai/threats/technologies/extensions-for-leaflet-map). Vendors: [Hupe13](https://junglewise.ai/threats/vendors/hupe13).

## Quick answers

**Is CVE-2026-5451 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-5451 being exploited in the wild.

**How severe is CVE-2026-5451?** Medium severity, with a CVSS score of 6.4, published 8 April 2026.

**Which products and versions are affected?** Hupe13 Extensions for Leaflet Map 0 - 4.14.

**Is there a fix for CVE-2026-5451?** A patch was published on 2026-04-08: Fixed in version 4.15 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-5451 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-5451?** Check whether you run Hupe13 Extensions for Leaflet Map at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Extensions for Leaflet Map plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) due to insufficient input sanitization and output escaping on user-supplied attributes within the 'elevation-track' shortcode. An authenticated attacker with Contributor-level access or higher can exploit this by injecting arbitrary web scripts into a post or page. These scripts are stored on the server and execute in the context of a user's browser session whenever they visit the compromised page. The vulnerability is present in all versions up to and including 4.14 and was addressed in version 4.15.

## Affected products

- hupe13 Extensions for Leaflet Map 0 - 4.14

## Timeline

- 2026-04-08: disclosed
- 2026-04-08: advisory
- 2026-04-08: patched: Fixed in version 4.15

## References

- [https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.11/php/functions.php](https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.11/php/functions.php)
- [https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.11/php/multielevation.php](https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.11/php/multielevation.php)
- [https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.15/php/functions.php?rev=3500851](https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.15/php/functions.php?rev=3500851)
- [https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.15/php/multielevation.php?rev=3500851](https://plugins.trac.wordpress.org/browser/extensions-leaflet-map/tags/4.15/php/multielevation.php?rev=3500851)
- [https://wordpress.org/plugins/extensions-leaflet-map](https://wordpress.org/plugins/extensions-leaflet-map)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/7749c45a-f956-4df6-98d0-5ec0db95185e?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/7749c45a-f956-4df6-98d0-5ec0db95185e?source=cve)

## Related threats

- [Extensions for Leaflet Map stored cross-site scripting](https://junglewise.ai/threats/cve-2026-114703-improper-neutralization-of-input-during-web-page-generation)
- [hupe13 Extensions for Leaflet Map DOM-based XSS](https://junglewise.ai/threats/cve-2026-57380-hupe13-extensions-for-leaflet-map-dom-based-xss)