The wp-mpdf plugin for WordPress, developed by fkrauthan, contains a stored cross-site scripting vulnerability due to improper input sanitization during web page generation. This vulnerability affects all versions up to 3.9.1 and allows an attacker with low privileges to inject malicious scripts that execute when a user interacts with the affected content. The vulnerability has a CVSS 3.1 base score of 6.5, reflecting network attack vector, low attack complexity, required privileges, user interaction, and impacts on confidentiality, integrity, and availability.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected site, potentially leading to data disclosure, modification, or disruption of service. The impact is limited by the requirement for low privileges and user interaction, but the vulnerability affects confidentiality, integrity, and availability to a limited extent.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider restricting access to the plugin features for untrusted users and avoid interacting with suspicious content generated by the plugin. Monitor vendor channels for updates and apply patches promptly once available.