The UsersWP plugin for WordPress, which provides front-end login, user registration, user profile, and members directory functionality, is vulnerable to stored cross-site scripting (CWE-79) due to improper neutralization of input during web page generation. This vulnerability affects all versions up to and including 1.2.6. It allows authenticated users with contributor-level or higher permissions to inject arbitrary web scripts via the plugin's shortcodes, which are then stored and executed when other users access the injected pages. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, required privileges at the contributor level, no user interaction, and impacts on confidentiality and integrity but not availability.

Successful exploitation allows an authenticated contributor or higher to inject malicious scripts that execute in the context of other users viewing the affected pages. This can lead to unauthorized disclosure of information and modification of data within the scope of the affected WordPress site. There is no indication of impact on system availability. No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level permissions to trusted users only and consider disabling or limiting use of the affected plugin's shortcodes. Monitor official sources for updates or patches addressing this vulnerability.