Description
The Flex Guten plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘thumbnailHoverEffect’ parameter in all versions up to, and including, 1.2.5 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.
Published: 2025-08-06
Score: 6.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Stored Cross‑Site Scripting (XSS) via authenticated contributor access
Action: Apply Patch
AI Analysis

Impact

The Flex Guten WordPress plugin is vulnerable to a stored Cross‑Site Scripting flaw caused by insufficient sanitization of the thumbnailHoverEffect parameter. The vulnerability allows an authenticated attacker with Contributor authority or higher to inject arbitrary scripts that execute when a user views a page containing the injected content. This weakness is classified as CWE‑79.

Affected Systems

The flaw affects the Flex Guten – Multile Blocks plugin from dragwp in all versions up to and including 1.2.5. Users running any of these releases and granting Contributor‑level access to others are at risk.

Risk and Exploitability

The severity is moderate with a CVSS score of 6.4, and the EPSS score is less than 1%, indicating a low likelihood of exploitation. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires authenticated Contributor‑level access, so it is a local threat rather than remote unauthenticated.

Generated by OpenCVE AI on April 20, 2026 at 20:00 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Flex Guten to any version newer than 1.2.5 to remove the vulnerability.
  • If upgrading is not immediately possible, restrict Contributor permissions on posts that use the thumbnailHoverEffect feature.
  • As a temporary workaround, configure the plugin or use a filter to strip or escape the thumbnailHoverEffect parameter before rendering to users.

Generated by OpenCVE AI on April 20, 2026 at 20:00 UTC.

Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-23731 The Flex Guten plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘thumbnailHoverEffect’ parameter in all versions up to, and including, 1.2.5 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.
History

Wed, 08 Apr 2026 18:30:00 +0000

Type Values Removed Values Added
References

Wed, 06 Aug 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 06 Aug 2025 08:00:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Vendors & Products Wordpress
Wordpress wordpress

Wed, 06 Aug 2025 02:00:00 +0000

Type Values Removed Values Added
Description The Flex Guten plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘thumbnailHoverEffect’ parameter in all versions up to, and including, 1.2.5 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.
Title Flex Guten <= 1.2.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via thumbnailHoverEffect Parameter
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Subscriptions

Wordpress Wordpress
cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-04-08T17:22:01.830Z

Reserved: 2025-06-18T21:31:52.040Z

Link: CVE-2025-6256

cve-icon Vulnrichment

Updated: 2025-08-06T15:59:36.481Z

cve-icon NVD

Status : Deferred

Published: 2025-08-06T02:15:49.313

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-6256

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-20T20:15:06Z

Weaknesses