VK Filter Search <= 2.20.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Filter Search Block 'FormID' Attribute
- ID
- WPSEC-2026-3024
- Plugin
- VK Filter Search (vk-filter-search)
- Affected
- from 2.0.0 before 2.22.2
- Remediation
- Update to 2.22.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-11-13
- Attack surface
- VK Filter Search on WPSec AttackSurface
- Fix released
- Published
Description
The VK Filter Search plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'FormID' attribute of the Filter Search block in all versions up to, and including, 2.20.7. This is due to insufficient output escaping: the block's render callback places the attribute value unescaped into the value attribute of the hidden vkfs_form_id input it substitutes into the block content, and the rendered form could also be stored and shown again on search result pages. 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.
References
- https://wpsec.com/vuln/WPSEC-2026-3024/
- https://plugins.svn.wordpress.org/vk-filter-search/tags/2.22.2/
- https://wordpress.org/plugins/vk-filter-search/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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