EUVD-2026-14151
GHSA-qf9c-wfj4-w8fw
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
The Weaver Show Posts plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'add_class' parameter in all versions up to, and including, 1.8.1. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This primarily affects multisite installations where Administrators do not have the unfiltered_html capability.
Analysis
The Weaver Show Posts plugin for WordPress contains a Stored Cross-Site Scripting (XSS) vulnerability in the 'add_class' parameter due to insufficient input sanitization and output escaping. Authenticated attackers with Administrator-level access can inject arbitrary web scripts that execute when users access injected pages, with particular impact in multisite installations where Administrators lack the unfiltered_html capability. …
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Remediation
Within 30 days: Identify affected systems running all and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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