Cross-Site Scripting in ThemeFusion Fusion Builder
CVE-2025-49940

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
Fusion Builder
Vendor
CVE Published:
22 October 2025

What is CVE-2025-49940?

A vulnerability exists in ThemeFusion's Fusion Builder that allows for improper neutralization of input during web page generation, leading to a DOM-Based Cross-Site Scripting (XSS) attack. This issue affects versions of Fusion Builder from an unspecified version up to and including 3.13.2. Attackers may exploit this vulnerability to inject malicious scripts into the web page, which can execute unauthorized actions on behalf of users. This can compromise user data and the integrity of the application.

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Deploy the Patch

Affected Version(s)

Fusion Builder <= n/a

References

https://patchstack.com/database/Wordpress/Plugin/fusion-b...
vdb-entry

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

João Pedro S Alcântara (Kinorth) (Patchstack Alliance)
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