CVE-2025-52777: Pay with Contact Form 7 XSS Vulnerability

CVE-2025-52777 Overview

CVE-2025-52777 is a reflected Cross-Site Scripting (XSS) vulnerability in the cmsMinds Pay with Contact Form 7 WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. All plugin versions up to and including 1.0.4 are affected. Attackers can craft a malicious URL that, when clicked by an authenticated or anonymous victim, executes attacker-controlled JavaScript in the browser context of the vulnerable WordPress site. Successful exploitation allows session theft, credential harvesting through injected forms, and unauthorized actions on behalf of the victim.

Critical Impact
Reflected XSS enables attackers to execute arbitrary JavaScript in a victim's browser session, leading to account compromise and potential WordPress site takeover when administrators are targeted.

Affected Products

cmsMinds Pay with Contact Form 7 plugin (pay-with-contact-form-7) versions through 1.0.4
WordPress installations with the affected plugin enabled
Sites accepting payment form submissions via Contact Form 7 integration

Discovery Timeline

2025-07-16 - CVE-2025-52777 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-52777

Vulnerability Analysis

The vulnerability is a reflected XSS issue in the Pay with Contact Form 7 plugin, which integrates payment processing into Contact Form 7 submissions. The plugin reflects user-controlled input from HTTP request parameters back into the rendered HTML response without applying proper output encoding or sanitization. An attacker who delivers a crafted link to a target user, typically via phishing or social engineering, triggers script execution in the victim's browser within the origin of the WordPress site.

Because the issue requires user interaction and the impacted scope crosses security boundaries, exploitation can affect logged-in administrators, exposing privileged session cookies and the WordPress admin interface to attacker-controlled code.

Root Cause

The root cause is missing or insufficient input sanitization and output encoding on parameters processed by the plugin's request handlers. Input received from the client is concatenated into HTML output without escaping characters such as <, >, ", and ', allowing injected <script> tags or event-handler attributes to be parsed by the browser as executable code.

Attack Vector

Exploitation requires an attacker to deliver a malicious URL containing a payload to a victim. Once the victim loads the URL on the vulnerable site, the server reflects the payload into the HTML response and the browser executes it. Refer to the Patchstack Vulnerability Report for technical details.

// No verified proof-of-concept code is publicly available.
// Exploitation pattern: attacker-crafted URL with script payload in a
// reflected parameter handled by the Pay with Contact Form 7 plugin.

Detection Methods for CVE-2025-52777

Indicators of Compromise

HTTP request logs containing URL parameters with encoded <script>, onerror=, onload=, or javascript: patterns directed at pages rendering the Pay with Contact Form 7 plugin.
Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after visiting plugin-related URLs.
WordPress audit log entries showing administrative actions originating from anomalous referrers or sessions.

Detection Strategies

Inspect web server and WAF logs for reflected XSS payloads in query strings and POST bodies handled by the pay-with-contact-form-7 plugin paths.
Deploy WAF rules that flag common XSS signatures targeting Contact Form 7 endpoints and payment callback handlers.
Correlate browser-side Content Security Policy (CSP) violation reports with server-side request logs to surface injection attempts.

Monitoring Recommendations

Enable WordPress audit logging to track administrator session activity and configuration changes.
Monitor plugin version inventories across managed WordPress fleets to detect installations still running 1.0.4 or earlier.
Alert on phishing campaigns referencing affected sites or carrying long encoded URL parameters targeting Contact Form 7 endpoints.

How to Mitigate CVE-2025-52777

Immediate Actions Required

Identify all WordPress sites running the pay-with-contact-form-7 plugin and enumerate installed versions.
Disable or remove the plugin on sites running version 1.0.4 or earlier until a patched release is verified.
Force password resets and invalidate active sessions for WordPress administrators on potentially exposed sites.

Patch Information

The vendor advisory tracked through Patchstack lists all versions through 1.0.4 as vulnerable. Site operators should upgrade to a release greater than 1.0.4 once published by cmsMinds. Consult the Patchstack Vulnerability Report for current fixed-version guidance.

Workarounds

Apply a virtual patch via WAF rules that block reflected XSS payloads on plugin URLs and Contact Form 7 submission endpoints.
Enforce a strict Content Security Policy that disallows inline script execution and restricts script sources to trusted origins.
Restrict access to the WordPress admin interface to known IP ranges or VPN-protected networks to limit administrator exposure to phishing.

bash

# Example WAF / Apache mod_security rule to block obvious reflected XSS payloads
SecRule ARGS "@rx (?i)(<script|javascript:|onerror=|onload=)" \
    "id:1005277,phase:2,deny,status:403,\
    msg:'Possible reflected XSS targeting pay-with-contact-form-7'"