CVE-2026-28143 is an unauthenticated cross-site scripting (XSS) vulnerability in WPMU DEV's Forminator plugin, affecting all versions up to 1.56.0. The issue stems from improper neutralization of input during web page generation (CWE-79), which could allow attackers to execute arbitrary scripts in the context of the affected application. The CVSS 3.1 base score is 7.1, indicating 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 is currently available, and no known exploits are reported in the wild.

Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary scripts in the context of users visiting the affected web pages, potentially leading to data disclosure, modification, or disruption of service. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS vector.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying workarounds if available or restrict access to vulnerable endpoints where feasible. Monitor WPMU DEV advisories for updates.