CVE-2026-15644 is a stored cross-site scripting vulnerability in the Powerkit – Supercharge your WordPress Site plugin for WordPress. The vulnerability exists in the handling of the 'style' shortcode attribute, where input is not properly sanitized or escaped before being rendered on web pages. Authenticated attackers with contributor-level privileges or higher can exploit this to inject arbitrary scripts that execute in the context of users viewing the compromised pages. This can lead to limited confidentiality and integrity impacts as indicated by the CVSS vector.

An attacker with contributor-level access or higher can inject malicious scripts into pages via the vulnerable shortcode attribute. These scripts execute in the context of users who view the injected pages, potentially leading to information disclosure and manipulation of page content. The CVSS score of 6.4 reflects a medium severity with low complexity and no user interaction required, but limited to authenticated attackers with some privileges.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently available. Until a patch is released, restrict contributor-level access to trusted users only and consider disabling or removing the Powerkit plugin if feasible to mitigate risk.