What is the CVSS score of EUVD-2026-15919?

EUVD-2026-15919 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

Which versions of Fusion Builder are affected by EUVD-2026-15919?

ThemeFusion Fusion Builder WordPress plugin versions prior to 3.15.0 contain a reflected XSS vulnerability that allows unauthenticated attackers to inject malicious scripts into web pages,…. A patch is available.

How to fix or mitigate EUVD-2026-15919?

Within 24 hours: Inventory all WordPress installations using Fusion Builder and document current versions. Within 7 days: Update Fusion Builder to version 3.15.0 or later across all affected WordPress sites; verify updates completed via plugin management dashboard. Within 30 days: Conduct security audit of WordPress environment; review web application firewall (WAF) logs for XSS attack patterns; implement input validation and output encoding best practices site-wide.

Fusion Builder EUVD-2026-15919

| CVE-2026-32542 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-03-25 Patchstack

XSS Fusion Builder

7.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Re-analysis Queued

Apr 24, 2026 - 16:37 vuln.today

cvss_changed

Analysis Updated

Apr 16, 2026 - 06:14 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

3.15.0

EUVD ID Assigned

Mar 25, 2026 - 16:47 euvd

EUVD-2026-15919

Analysis Generated

Mar 25, 2026 - 16:47 vuln.today

CVE Published

Mar 25, 2026 - 16:15 nvd

HIGH 7.1

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in ThemeFusion Fusion Builder fusion-builder allows Reflected XSS.This issue affects Fusion Builder: from n/a through < 3.15.0.

AnalysisAI

A Reflected Cross-Site Scripting (XSS) vulnerability exists in ThemeFusion Fusion Builder, a WordPress page builder plugin, affecting all versions prior to 3.15.0. An unauthenticated attacker can inject malicious JavaScript into web pages through improper input sanitization, allowing them to steal session cookies, perform actions on behalf of users, or redirect visitors to malicious sites. No CVSS score, EPSS data, or public proof-of-concept have been officially published, but the vulnerability has been documented by Patchstack and assigned EUVD-2026-15919; patch availability is confirmed via the vendor advisory.

Technical ContextAI

The vulnerability stems from improper neutralization of user-supplied input during web page generation in Fusion Builder (CPE: cpe:2.3:a:themefusion:fusion_builder), a WordPress plugin used for visual page design. The root cause is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), indicating that the application fails to properly encode or validate user input before rendering it in HTML contexts. This allows attackers to inject arbitrary JavaScript that executes in the context of a victim's browser when they visit a crafted link, bypassing client-side filters and potentially server-side protections due to inadequate output encoding.

RemediationAI

Immediately upgrade ThemeFusion Fusion Builder to version 3.15.0 or later, which contains the patch for this reflected XSS vulnerability. WordPress administrators should check their plugin installations via the WordPress dashboard (Plugins > Installed Plugins) and apply the update automatically or manually from the WordPress plugin repository. Until an update can be applied, implement input validation and output encoding at the web server level using a Web Application Firewall (WAF) to detect and block payloads containing script tags or event handlers. Additionally, enforce Content Security Policy (CSP) headers to restrict script execution origins, reducing the impact of any injected XSS code. Consult the Patchstack advisory and ThemeFusion's official security channels for detailed patch notes and any additional guidance.