CVE-2026-3239 is a stored cross-site scripting vulnerability (CWE-79) in the Strong Testimonials plugin for WordPress, affecting all versions up to and including 3.2.21. The issue is due to improper neutralization of input during web page generation, specifically insufficient input sanitization and output escaping on user-supplied attributes in the testimonial_view shortcode. Authenticated attackers with contributor-level privileges or higher can inject arbitrary web scripts that execute in the context of users viewing the injected pages. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and impact on confidentiality and integrity with no availability impact. No official patch or vendor advisory is available to confirm remediation status.

An attacker with contributor-level or higher access can inject malicious scripts into pages rendered by the testimonial_view shortcode. These scripts execute in the browsers of users who view the affected pages, potentially leading to unauthorized actions or data disclosure within the context of the affected site. The vulnerability impacts confidentiality and integrity but does not affect availability. There are no known exploits in the wild currently.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and consider disabling or removing the Strong Testimonials plugin if possible. Monitor for updates from the vendor and apply patches promptly once released.