CVE-2026-4389 MEDIUM

CVE-2026-4389: DSGVO snippet for Leaflet Map and its Extensions <= 3.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'unset' Attribute

Vendor Hupe13
Product DSGVO snippet for Leaflet Map and its Extensions
Weakness CWE-79 · XSS
Published March 26, 2026
Last update April 8, 2026

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

The DSGVO snippet for Leaflet Map and its Extensions plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `leafext-cookie-time` and `leafext-delete-cookie` shortcodes in all versions up to, and including, 3.1. This is due to insufficient input sanitization and output escaping on user supplied attributes (`unset`, `before`, `after`). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Explanation of Vulnerability in Simple Terms

02Summary

The DSGVO snippet for Leaflet Map and its Extensions versions 3.1 and earlier contain a cross-site scripting vulnerability. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers, potentially affecting the entire site. The vulnerability requires network access but no user interaction from the victim.

What an attacker can do

03Attacker Capabilities

Inject malicious scripts that run in other users' browsers and affect the entire site.

Potential impact on your site

04Site Impact

Authenticated users with low privileges can compromise other users' sessions and site functionality.

Conditions required to exploit

05Prerequisites

Attacker must have low-level authenticated access to the site.

Key dates

06Disclosure timeline

March 26, 2026 CVE published
April 8, 2026 Record updated

Related vulnerabilities

08Related CVE