CVE-2025-48345: Contact Form 7 Editor Button XSS Flaw

CVE-2025-48345 Overview

CVE-2025-48345 is a reflected Cross-Site Scripting (XSS) vulnerability in the arisoft Contact Form 7 Editor Button plugin for WordPress. The plugin fails to properly neutralize user-supplied input before reflecting it back in generated web pages. Attackers can craft malicious URLs that execute arbitrary JavaScript in the victim's browser when the link is clicked. The flaw affects all versions of cf7-editor-button from initial release through 1.0.0. The vulnerability is categorized under [CWE-79] and carries a CVSS 3.1 base score of 7.1.

Critical Impact

Successful exploitation lets attackers execute JavaScript in the context of a victim's session, enabling credential theft, session hijacking, and unauthorized actions on the WordPress site.

Affected Products

• arisoft Contact Form 7 Editor Button (cf7-editor-button) plugin for WordPress
• All versions from initial release through 1.0.0
• WordPress installations with the affected plugin enabled

Discovery Timeline

• 2025-07-16 - CVE-2025-48345 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-48345

Vulnerability Analysis

The Contact Form 7 Editor Button plugin processes user-controlled parameters and renders them into the HTML response without adequate output encoding or input sanitization. An attacker constructs a URL containing JavaScript payload and convinces an authenticated WordPress user to click it. The browser then parses the reflected payload and executes it within the trusted origin of the WordPress site.

Because the attack scope is marked as Changed in the CVSS vector, the executed script can affect resources beyond the vulnerable component, including the WordPress administrative interface. User interaction is required, which typically means clicking a crafted link from email, chat, or a malicious referrer. The EPSS data indicates a low current probability of in-the-wild exploitation, but reflected XSS in WordPress plugins remains a common phishing and account-takeover vector.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. The plugin does not apply WordPress sanitization helpers such as esc_html(), esc_attr(), or wp_kses() to request parameters before echoing them into the page response. As a result, HTML and JavaScript metacharacters in attacker-controlled input retain their executable meaning when rendered in the browser.

Attack Vector

Exploitation occurs over the network and does not require prior authentication. An attacker hosts or distributes a URL pointing to a vulnerable endpoint exposed by cf7-editor-button, embedding a script payload in a reflected parameter. When a logged-in administrator or editor follows the link, the injected JavaScript runs with that user's privileges, allowing actions such as creating new admin accounts, modifying content, or exfiltrating session cookies.

The vulnerability mechanism is described in the Patchstack Vulnerability Report. No verified public proof-of-concept code is currently available.

Detection Methods for CVE-2025-48345

Indicators of Compromise

• Web server access logs showing requests to cf7-editor-button endpoints with URL parameters containing <script>, javascript:, onerror=, or onload= substrings
• Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after clicking external links
• New or modified WordPress administrator accounts created without a corresponding legitimate workflow
• HTTP referrers in logs originating from untrusted domains immediately preceding suspicious admin actions

Detection Strategies

• Inspect HTTP request and response bodies for reflected parameter values that contain HTML or JavaScript syntax in plugin URLs
• Deploy web application firewall (WAF) rules that flag reflected XSS payload patterns against WordPress plugin endpoints
• Correlate administrator session activity with preceding external link clicks to identify potential XSS-driven account abuse
• Audit installed plugin inventories against known vulnerable versions of cf7-editor-button

Monitoring Recommendations

• Enable WordPress audit logging to record administrator actions, plugin changes, and user creation events
• Forward web server and application logs to a centralized analytics platform for query and retention
• Alert on Content Security Policy (CSP) violation reports that indicate inline script execution attempts
• Monitor for spikes in 200-status responses to plugin URLs carrying long or encoded query strings

How to Mitigate CVE-2025-48345

Immediate Actions Required

• Deactivate and remove the Contact Form 7 Editor Button plugin until a patched version is available
• Audit WordPress user accounts for unauthorized administrators and reset credentials for privileged users
• Apply a WAF ruleset that blocks reflected XSS patterns targeting cf7-editor-button request parameters
• Enforce a strict Content Security Policy to limit inline script execution across the WordPress site

Patch Information

At the time of publication, no fixed version of cf7-editor-button is identified in the advisory. Versions through 1.0.0 remain vulnerable. Administrators should monitor the Patchstack Vulnerability Report and the vendor's WordPress plugin page for updates.

Workarounds

• Uninstall cf7-editor-button and use an alternative Contact Form 7 extension that receives active maintenance
• Restrict access to /wp-admin by IP allowlist to reduce exposure of authenticated users to malicious links
• Require administrators to use isolated browser profiles when managing WordPress to limit cross-site impact
• Train privileged users to avoid clicking untrusted links that target the WordPress administrative interface

# Configuration example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate cf7-editor-button
wp plugin delete cf7-editor-button