CVE-2025-23812: Contact Form 7 Round Robin XSS Flaw

CVE-2025-23812 Overview

CVE-2025-23812 is a reflected Cross-Site Scripting (XSS) vulnerability affecting the David Jeffrey Contact Form 7 Round Robin Lead Distribution plugin for WordPress. The flaw stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. Attackers can craft malicious URLs that, when visited by an authenticated or unauthenticated victim, execute arbitrary JavaScript in the victim's browser context. The vulnerability affects all plugin versions up to and including 1.2.1.

Critical Impact
Successful exploitation enables session hijacking, credential theft, and arbitrary actions performed on behalf of the victim within the WordPress site context.

Affected Products

Contact Form 7 Round Robin Lead Distribution plugin versions through 1.2.1
WordPress sites with the contact-form-7-round-robin-lead-distribution plugin installed and active
Vendor: David Jeffrey

Discovery Timeline

2025-01-22 - CVE-2025-23812 published to the National Vulnerability Database
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-23812

Vulnerability Analysis

The vulnerability is a reflected Cross-Site Scripting (XSS) issue in the Contact Form 7 Round Robin Lead Distribution WordPress plugin. The plugin fails to properly sanitize and encode user-controlled input before reflecting it back into HTTP responses. An attacker can embed JavaScript payloads inside request parameters that the plugin renders directly into the resulting HTML page.

Exploitation requires user interaction — typically clicking a crafted link delivered via phishing, social media, or a compromised third-party page. The attack vector is network-based and requires no privileges on the target site. Because the payload executes within the WordPress site's origin, an attacker can read session cookies, inject content, perform CSRF-style requests, or redirect the victim to attacker-controlled infrastructure.

The scope-changed CVSS vector indicates that exploitation can affect resources beyond the vulnerable component, such as the browser session and any authenticated WordPress context the victim holds.

Root Cause

The plugin reflects request parameters into rendered HTML without applying output encoding or input validation. Functions such as esc_html(), esc_attr(), or wp_kses() are either missing or applied inconsistently on parameters echoed back to the user. This permits HTML and JavaScript syntax to break out of the surrounding context.

Attack Vector

An attacker constructs a URL targeting a vulnerable plugin endpoint with a parameter containing JavaScript. The attacker delivers the link to a victim through email, chat, or a malicious referrer. When the victim visits the URL, the WordPress server reflects the payload into the response and the browser executes it. Refer to the Patchstack Vulnerability Report for technical details on the affected parameter and endpoint.

Detection Methods for CVE-2025-23812

Indicators of Compromise

HTTP request logs containing <script>, onerror=, onload=, or javascript: strings in query parameters targeting plugin endpoints
Unusual outbound requests from administrator browsers to unfamiliar domains immediately after visiting WordPress URLs
Unexpected creation of WordPress administrator accounts or modification of plugin settings
Web server access logs showing URL-encoded payloads such as %3Cscript%3E directed at the plugin

Detection Strategies

Inspect web server and WAF logs for reflected parameter values containing HTML or JavaScript syntax
Deploy Content Security Policy (CSP) reporting to capture inline script execution attempts
Monitor for anomalous referrer chains where external sites link to WordPress URLs containing scripting characters
Correlate authenticated WordPress sessions with suspicious client-side activity such as forced logouts or unexpected privilege changes

Monitoring Recommendations

Enable verbose HTTP request logging on the WordPress reverse proxy or WAF for plugin URLs
Alert on requests where query parameters contain encoded angle brackets, event handlers, or javascript: URIs
Track WordPress audit logs for administrative changes occurring shortly after a user clicks an external link
Review browser console error telemetry from administrator workstations for CSP violations

How to Mitigate CVE-2025-23812

Immediate Actions Required

Deactivate the Contact Form 7 Round Robin Lead Distribution plugin until a patched version is confirmed available
Audit recent WordPress administrator activity and force session invalidation for privileged accounts
Deploy a WAF rule blocking requests to the plugin endpoint that contain script tags or event handler attributes
Educate administrators to avoid clicking unverified links pointing to the WordPress site

Patch Information

At the time of publication, the vulnerability affects all versions through 1.2.1. Site administrators should consult the Patchstack Vulnerability Report and the official WordPress plugin repository for an updated release. Apply the vendor-supplied patch as soon as it becomes available.

Workarounds

Remove or disable the plugin entirely if a patched version is not yet published
Configure a strict Content Security Policy that disallows inline script execution on WordPress pages
Restrict access to WordPress administration to known IP ranges via web server or WAF controls
Apply virtual patching at the WAF layer to filter payloads matching XSS signatures targeting the plugin path

bash

# Example WAF rule (ModSecurity) to block reflected XSS payloads against the plugin path
SecRule REQUEST_URI "@contains /wp-content/plugins/contact-form-7-round-robin-lead-distribution/" \
    "chain,id:1002025023812,phase:2,deny,status:403,log,msg:'CVE-2025-23812 XSS attempt blocked'"
    SecRule ARGS "@rx (?i)(<script|onerror=|onload=|javascript:)" "t:urlDecodeUni,t:lowercase"