CVE-2026-1454

High

Published: 11 March 2026

Published

11 March 2026

Modified

22 April 2026

KEV Added

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Patch

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CVSS Score 7.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS Score 0.0012 31.1th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-1454 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Wordpress (inferred from references). Its CVSS base score is 7.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Browser Session Hijacking (T1185); ranked at the 31.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Browser Session Hijacking (T1185) and 2 other techniques.

Threat & Defense Details

Likely Mitigating ControlsAI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing

addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation

addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering

addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

MITRE ATT&CK Enterprise TechniquesAI

T1185 Browser Session Hijacking Collection

Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.

attack.mitre.org →

T1056.003 Web Portal Capture Collection

Adversaries may install code on externally facing portals, such as a VPN login page, to capture and transmit credentials of users who attempt to log into the service.

attack.mitre.org →

T1539 Steal Web Session Cookie Credential Access

An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.

attack.mitre.org →

Why these techniques?

Stored XSS enables arbitrary JS execution in admin browser context, directly facilitating session hijacking, web portal input capture, and cookie theft.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

NVD Description

The Responsive Contact Form Builder & Lead Generation Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.0.1 via form field submissions. This is due to insufficient input sanitization in the lfb_lead_sanitize()…

function which omits certain field types from its sanitization whitelist, combined with an overly permissive wp_kses() filter at output time that allows onclick attributes on anchor tags. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator views the lead entries in the WordPress dashboard.

Deeper analysisAI

CVE-2026-1454 is a stored cross-site scripting (XSS) vulnerability affecting the Responsive Contact Form Builder & Lead Generation Plugin for WordPress in all versions up to and including 2.0.1. The issue stems from insufficient input sanitization in the lfb_lead_sanitize() function, which omits certain field types from its sanitization whitelist, paired with an overly permissive wp_kses() filter during output that allows onclick attributes on anchor tags. This CWE-79 flaw has a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N).

Unauthenticated attackers can exploit this vulnerability by submitting malicious form fields containing arbitrary web scripts. When a site administrator views the resulting lead entries in the WordPress dashboard, the injected scripts execute in the administrator's browser context, potentially enabling theft of session cookies, keystroke logging, or other client-side attacks.

References to the vulnerability include code locations in the plugin's ajax-functions.php and show-lead.php files at version 2.0.1, a patch applied in WordPress plugin trac changeset 3462549, and details from Wordfence threat intelligence, which recommend updating the plugin beyond version 2.0.1 to mitigate the issue.