CVE-2025-48354: Elementor Post Filter Widgets XSS Flaw

CVE-2025-48354 Overview

CVE-2025-48354 is a stored Cross-Site Scripting (XSS) vulnerability in the WP Smart Widgets Better Post & Filter Widgets for Elementor WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation [CWE-79]. Affected versions include all releases up to and including 1.6.1. An authenticated attacker with low privileges can inject malicious JavaScript that persists in the page and executes in the browser of any visitor who renders the affected content. Successful exploitation can lead to session theft, credential harvesting, forced administrative actions, and redirection to attacker-controlled infrastructure.

Critical Impact
Authenticated contributors can persist JavaScript that runs in administrator browsers, enabling account takeover and site compromise.

Affected Products

WP Smart Widgets Better Post & Filter Widgets for Elementor
Plugin slug better-post-filter-widgets-for-elementor
Versions from n/a through <= 1.6.1

Discovery Timeline

2025-08-28 - CVE-2025-48354 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-48354

Vulnerability Analysis

The vulnerability is a stored XSS issue in the Better Post & Filter Widgets for Elementor plugin. The plugin fails to sanitize and escape input passed through widget configuration fields before rendering them in the page output. An attacker with contributor-level or higher access can save a widget containing JavaScript payloads. When any user loads a page containing the affected widget, the injected script executes in their browser session under the site's origin.

Because the payload persists in the WordPress database, every subsequent page render delivers the malicious script. The scope change reflected in the CVSS vector indicates the payload can affect resources beyond the vulnerable component, including administrative sessions and other authenticated users of the site.

Root Cause

The root cause is missing or insufficient output encoding in widget rendering logic. WordPress plugins are expected to apply escaping functions such as esc_html(), esc_attr(), or wp_kses_post() when reflecting user-controlled data into HTML. The affected code paths in versions up to 1.6.1 emit attacker-controlled strings without adequate neutralization, allowing HTML and script tags to break out of intended contexts.

Attack Vector

Exploitation requires network access to the WordPress site, low-privilege authentication, and user interaction to trigger the payload. An attacker with an account capable of editing Elementor content submits crafted widget parameters containing JavaScript. When an administrator or visitor loads the page, the browser parses the injected payload and executes it. Common post-exploitation activities include stealing authentication cookies, invoking WordPress REST API endpoints on behalf of the victim, and creating new administrator accounts. Refer to the Patchstack Vulnerability Report for additional technical details.

Detection Methods for CVE-2025-48354

Indicators of Compromise

Unexpected <script> tags, on* event handlers, or javascript: URIs stored in post content, widget options, or wp_postmeta rows related to Elementor widgets
Outbound requests from administrator sessions to unknown domains shortly after loading pages that render the affected widget
New WordPress administrator accounts or modified user roles that do not match change-management records

Detection Strategies

Query the WordPress database for widget serialized data containing HTML tags or script fragments in fields sourced from user input
Review web server access logs for POST requests to admin-ajax.php or Elementor editor endpoints containing encoded script payloads
Inspect rendered pages with automated scanners that flag reflected or stored script content

Monitoring Recommendations

Alert on creation or modification of WordPress users with administrator privileges from unusual IP addresses
Monitor browser telemetry and web proxy logs for anomalous script execution or cross-origin requests originating from WordPress admin sessions
Track plugin version inventory across managed WordPress sites and alert on hosts still running better-post-filter-widgets-for-elementor version 1.6.1 or earlier

How to Mitigate CVE-2025-48354

Immediate Actions Required

Update the Better Post & Filter Widgets for Elementor plugin to a version later than 1.6.1 as soon as a fixed release is available from the vendor
Audit existing Elementor pages and widget configurations for stored script payloads and remove any suspicious content
Rotate WordPress administrator passwords and invalidate active sessions if compromise is suspected

Patch Information

Consult the Patchstack Vulnerability Report for the current fix status and upgrade guidance. Apply the vendor-supplied update through the WordPress plugin manager once released, and verify the installed version reports higher than 1.6.1.

Workarounds

Restrict contributor, author, and editor accounts to trusted users only, since exploitation requires authenticated access to Elementor editing capabilities
Deploy a Web Application Firewall (WAF) rule that blocks requests to Elementor editor endpoints containing <script> tags or event handler attributes
Enforce a strict Content Security Policy (CSP) that disallows inline scripts and unsanctioned external script sources on WordPress-rendered pages
Temporarily deactivate the plugin if a patched version is not yet available and the widget functionality is not business-critical

bash

# Example: identify installed plugin version using WP-CLI
wp plugin get better-post-filter-widgets-for-elementor --field=version

# Deactivate the plugin until a fixed version is available
wp plugin deactivate better-post-filter-widgets-for-elementor