CVE-2026-32542
Published: 25 March 2026
Summary
CVE-2026-32542 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.4th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2026-32542 is an improper neutralization of input during web page generation vulnerability, classified as reflected cross-site scripting (XSS) under CWE-79, in the ThemeFusion Fusion Builder (fusion-builder) WordPress plugin. It affects all versions from n/a through those prior to 3.15.0. The issue was published on 2026-03-25 and carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L).
Attackers can exploit this vulnerability remotely over the network with low complexity and no required privileges, but it necessitates user interaction, such as clicking a malicious link. Exploitation enables reflected XSS, allowing limited impacts on confidentiality, integrity, and availability within a changed security scope, potentially leading to script execution in the victim's browser context.
The Patchstack advisory details the vulnerability in the WordPress Fusion Builder plugin and indicates it is fixed in version 3.15.0, recommending updates to this or later versions for mitigation.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-15919
Vulnerability details
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.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Reflected XSS in public-facing WordPress plugin directly enables exploitation of T1190 (public app), arbitrary JS execution via T1059.007, and requires malicious link delivery under T1204.001.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-15 directly addresses improper neutralization of input during web page generation by requiring output filtering to prevent reflected XSS payloads from executing in victims' browsers.
SI-10 enforces validation of user inputs to the Fusion Builder plugin, blocking malicious scripts before they can be reflected in generated web pages.
SI-2 mandates identification and patching of the specific flaw in Fusion Builder versions prior to 3.15.0, eliminating the root cause of the reflected XSS vulnerability.