EUVD-2026-51764
GHSA-f956-42q9-x55r
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
PR:L reflects mandatory contributor access; S:C captures cross-user browser impact; UI:N appropriate for stored XSS where victims browse normally; no availability impact.
Primary rating from Vendor (Wordfence).
CVSS VectorVendor: Wordfence
Lifecycle Timeline
2DescriptionCVE.org
The Powerkit - Supercharge your WordPress Site plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Shortcode Attributes in all versions up to, and including, 3.1.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AnalysisAI
Stored Cross-Site Scripting in the Powerkit plugin for WordPress (all versions through 3.1.0) allows authenticated attackers with contributor-level access to inject arbitrary JavaScript via shortcode attributes in the basic-elements module. The injected payload persists server-side and executes in the browsers of any user who visits an affected page, enabling session hijacking, credential theft, or malicious redirects. No public exploit code or CISA KEV listing has been identified at time of analysis, though the CVSS Scope:Changed rating and Wordfence disclosure reflect meaningful cross-user impact.
Technical ContextAI
Powerkit is a WordPress plugin developed by codesupplyco (CPE: cpe:2.3:a:codesupplyco:powerkit_-_supercharge_your_wordpress_site:*:*:*:*:*:*:*:*) that extends WordPress sites with UI components including progress bars. The vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation) resides in the basic-elements module, specifically in progressbars.php at line 109 and class-powerkit-basic-elements-public.php at line 83. WordPress shortcodes allow plugin-defined macros to be embedded in post content; when shortcode attributes are not properly sanitized on input and escaped on output, user-supplied values are reflected into rendered HTML unmodified. Because the payload is stored in the WordPress database and served to all page visitors, this is a persistent (stored) XSS rather than a reflected variant, making it more dangerous as no per-victim social engineering is required after injection.
RemediationAI
An upstream fix has been committed to the WordPress plugin repository as changeset 3629599 (https://plugins.trac.wordpress.org/changeset/3629599/powerkit); however, the exact patched release version number is not independently confirmed from the available data - update to the latest available version from the WordPress plugin directory and verify the installed version exceeds 3.1.0. As a compensating control while patching, restrict or remove the WordPress contributor role from untrusted users on affected sites, since exploitation specifically requires at least contributor-level access. Additionally, a Web Application Firewall (WAF) rule targeting shortcode attribute injection patterns can reduce exposure, though WAF bypass is possible and should not substitute for patching. Wordfence provides firewall coverage for its own users per the advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/f86c6ada-112b-4b1f-b1ac-7dd4920953c8.
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External POC / Exploit Code
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