The vulnerability CVE-2026-57380 in hupe13 Extensions for Leaflet Map involves improper neutralization of input during web page generation, resulting in a DOM-based cross-site scripting (XSS) issue. This allows an attacker to inject malicious scripts that execute in the context of the victim's browser. The affected versions include all versions up to and including 5.1. The CVSS 3.1 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available, and no known exploits in the wild have been reported.

Successful exploitation of this DOM-based XSS vulnerability can lead to partial compromise of confidentiality, integrity, and availability of the affected system or user data. Attackers may execute arbitrary scripts in the victim's browser, potentially leading to session hijacking, data theft, or other malicious actions within the context of the vulnerable application.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should exercise caution with untrusted input and consider implementing additional input validation or content security policies where possible.