CVE-2025-6256

MEDIUM

Flex Guten < 1.2.5 - Authenticated Stored Cross-Site Scripting via Thumbnail Hover Effect Parameter

Title source: llm
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 6.4
EPSS 0.0028
EPSS Percentile 19.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
dragwp/Flex Guten – A Multipurpose Gutenberg Blocks Plugin < 1.2.5
dragwp/Flex Guten – Multile Blocks < 1.2.5
Published Aug 06, 2025
Tracked Since Feb 18, 2026