CVE-2025-54683: WP Modal Popup XSS Vulnerability

CVE-2025-54683 Overview

CVE-2025-54683 is a reflected Cross-Site Scripting (XSS) vulnerability in the Astoundify WP Modal Popup with Cookie Integration WordPress plugin. The flaw affects all plugin versions up to and including 2.4. It stems from improper neutralization of user-supplied input during web page generation, categorized under [CWE-79]. Successful exploitation requires an authenticated user with high privileges to interact with a crafted link, allowing an attacker to execute arbitrary JavaScript in the victim's browser session and cross a security boundary via a scope change.

Critical Impact
Attackers can execute arbitrary script in the context of an authenticated WordPress user, enabling session compromise, content injection, and potential pivoting to administrative functions.

Affected Products

Astoundify WP Modal Popup with Cookie Integration plugin for WordPress
All versions from initial release through 2.4
WordPress installations with the wp-modal-popup-with-cookie-integration plugin enabled

Discovery Timeline

2025-08-14 - CVE CVE-2025-54683 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54683

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the WP Modal Popup with Cookie Integration plugin. User-controlled input is reflected back in the rendered HTML response without adequate output encoding or input sanitization. An attacker crafts a URL containing malicious JavaScript payloads and lures an authenticated high-privileged user to visit it. The payload executes in the victim's browser under the origin of the vulnerable WordPress site.

Because the vulnerability triggers a scope change, script execution can affect resources beyond the immediately vulnerable component. This raises the impact from a purely site-local defect to one that can touch other browser-accessible components tied to the same session.

Root Cause

The plugin fails to apply WordPress sanitization helpers such as sanitize_text_field() on incoming request parameters and does not escape output using esc_html(), esc_attr(), or esc_url() before rendering. This missing neutralization allows raw <script> payloads and event-handler attributes to survive the render path and execute in the DOM.

Attack Vector

Exploitation requires network access, low attack complexity, high privileges, and user interaction. An attacker crafts a URL containing an XSS payload targeting a vulnerable plugin endpoint, then delivers it via phishing, chat, or malicious referrer. When the authenticated administrator or high-privileged user clicks the link, the reflected payload executes in their session context. The scripted actions can then abuse the user's WordPress capabilities, exfiltrate cookies, or issue authenticated requests to admin endpoints.

No verified public proof-of-concept code is available. Refer to the Patchstack XSS Vulnerability Report for advisory details.

Detection Methods for CVE-2025-54683

Indicators of Compromise

HTTP GET or POST requests to plugin endpoints containing URL-encoded <script>, onerror=, onload=, or javascript: payloads
Unexpected outbound requests from administrator browser sessions to attacker-controlled domains shortly after clicking external links
New or modified WordPress user accounts, plugin files, or options changes originating from authenticated admin sessions

Detection Strategies

Inspect web server access logs for suspicious query strings targeting wp-modal-popup-with-cookie-integration paths
Deploy Web Application Firewall (WAF) rules that flag reflected XSS payload signatures in request parameters
Correlate administrator authentication events with anomalous admin-ajax or REST API calls following link-click activity

Monitoring Recommendations

Enable WordPress audit logging to record user role changes, plugin edits, and option modifications
Monitor Content Security Policy (CSP) violation reports for inline script execution on plugin-rendered pages
Track EPSS movement for CVE-2025-54683 and prioritize hunts if exploitation likelihood increases

How to Mitigate CVE-2025-54683

Immediate Actions Required

Identify all WordPress sites running the WP Modal Popup with Cookie Integration plugin at version 2.4 or earlier
Deactivate and remove the plugin if a patched release is not yet available for your version
Enforce least privilege for WordPress administrators and require unique sessions per admin account

Patch Information

At the time of NVD publication, no fixed version is listed for CVE-2025-54683. Consult the Patchstack advisory and the Astoundify plugin page for updated release information. Apply the vendor-supplied update immediately once available.

Workarounds

Remove or disable the wp-modal-popup-with-cookie-integration plugin until a patched version is released
Deploy a WAF rule to block requests containing common XSS payload signatures targeting plugin endpoints
Implement a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Train administrators to avoid clicking untrusted links while authenticated to the WordPress admin console

bash

# Configuration example: WordPress CLI plugin removal
wp plugin deactivate wp-modal-popup-with-cookie-integration
wp plugin delete wp-modal-popup-with-cookie-integration

# Example CSP header (adjust to your site's requirements)
# Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self';"