The vulnerability CVE-2026-28103 affects LambertGroup's LBG Zoominoutslider plugin (versions up to 5.4.5) and is classified as a reflected cross-site scripting (XSS) flaw. It results from improper neutralization of user input during web page generation, enabling attackers to inject and execute arbitrary scripts in users' browsers. The CVSS v3.1 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and impacts on confidentiality, integrity, and availability (all low). No patch or vendor advisory is currently available to confirm remediation status.

Successful exploitation of this reflected XSS vulnerability can allow attackers to execute arbitrary scripts in the context of users' browsers, potentially leading to theft of sensitive information, session hijacking, or other malicious actions that affect confidentiality, integrity, and availability at a low level. The scope of impact is changed, meaning the vulnerability affects resources beyond the initially vulnerable component.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying input validation or output encoding workarounds if feasible. Monitor official LambertGroup communications for updates on patches or mitigations. No specific vendor advisory or patch links are currently provided.