The WP Last Modified Info plugin for WordPress, up to version 1.9.2, suffers from a stored cross-site scripting vulnerability due to improper input neutralization during web page generation. This flaw allows an attacker with low privileges and requiring user interaction to inject malicious scripts that can execute in the context of other users, potentially leading to limited confidentiality, integrity, and availability impacts. The vulnerability has a CVSS 3.1 base score of 6.5, reflecting network attack vector, low attack complexity, privileges required, user interaction, and a scope change with partial impacts on confidentiality, integrity, and availability.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of users visiting the affected site, potentially leading to information disclosure, modification of content, or disruption of service. The impact is limited to the scope of the affected plugin and the privileges of the attacker. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting user input that can be stored and rendered by the plugin or disabling the plugin if feasible. Monitor official sources for updates and apply patches promptly once released.