CVE-2025-49940

WordPress Fusion Builder plugin <= 3.13.2 - Cross Site Scripting (XSS) vulnerability

6.5 Medium

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeFusion Fusion Builder fusion-builder allows DOM-Based XSS.This issue affects Fusion Builder: from n/a through <= 3.13.2.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.22%Up 0.2 points since Oct 23, 2025

What each source reports

CVE List Score used 6.5

WordPress Fusion Builder plugin <= 3.13.2 - Cross Site Scripting (XSS) vulnerability

Record: CVE-2025-49940
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2025-35518 6.5

Record: EUVD-2025-35518
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-fq5h-3m7r-254w 5.4

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')...

Record: GHSA-fq5h-3m7r-254w
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.5

Record: CVE-2025-49940
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

Affected products

themefusion fusion builder

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-49940 is a medium vulnerability (CVSS 6.5) in Themefusion Fusion Builder, published October 22, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. No source names a fixed version.