This vulnerability (CVE-2026-66445) is classified as CWE-79, indicating improper neutralization of input leading to Cross-Site Scripting (XSS) in the Open User Map plugin by 100plugins. It affects versions up to and including 1.4.46. The vulnerability allows contributors with some level of privileges to inject malicious scripts into web pages generated by the application. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L) reflects that the attack can be performed remotely over the network with low attack complexity, requires low privileges and user interaction, and can lead to partial confidentiality, integrity, and availability impacts with scope change. No patch or official remediation level has been published by the vendor or assigner as of the publication date.

Successful exploitation of this vulnerability could allow an attacker with contributor privileges to execute arbitrary scripts in the context of the affected web application. This can lead to partial disclosure of sensitive information, modification of data, and disruption of availability. The vulnerability affects confidentiality, integrity, and availability with a scope change, but the impact is limited to the privileges of the contributor role and requires user interaction.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting contributor privileges and applying any available input validation or output encoding workarounds if feasible. Monitor vendor communications for updates on patches or official mitigations.