CVE-2026-28141 is an unauthenticated cross-site scripting (XSS) vulnerability in the NextGEN Gallery plugin by Syed Balkhi, affecting versions up to 4.2.3. The vulnerability arises from improper neutralization of input during web page generation (CWE-79), allowing attackers to inject malicious scripts without authentication. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to data disclosure, modification, or disruption of service. The vulnerability affects confidentiality, integrity, and availability to a low degree but can be leveraged for further attacks depending on the victim environment.

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 such as disabling the affected plugin or restricting access to vulnerable functionality. Monitor vendor channels for updates and apply patches promptly once available.