CVE-2025-22697: Responsive Blocks XSS Vulnerability

CVE-2025-22697 Overview

CVE-2025-22697 is a reflected Cross-Site Scripting (XSS) vulnerability in the CyberChimps Responsive Blocks plugin for WordPress (responsive-block-editor-addons). The flaw affects all versions up to and including 1.9.9. It stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79].

An authenticated attacker with low privileges can craft a malicious URL that, when clicked by a victim, executes arbitrary JavaScript in the victim's browser session. The scope changes across a security boundary, meaning script execution can affect resources beyond the vulnerable component.

Critical Impact
Attackers can execute arbitrary JavaScript in a victim's browser to hijack sessions, perform actions on behalf of authenticated WordPress users, or redirect users to attacker-controlled infrastructure.

Affected Products

CyberChimps Responsive Blocks (responsive-block-editor-addons) WordPress plugin
All versions from initial release through 1.9.9
WordPress sites with the plugin installed and active

Discovery Timeline

2025-02-04 - CVE-2025-22697 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-22697

Vulnerability Analysis

The vulnerability is a reflected XSS flaw in the Responsive Blocks plugin, a Gutenberg block editor extension for WordPress. Reflected XSS occurs when input from an HTTP request is echoed back into a response without proper output encoding or sanitization.

Because the exploit requires user interaction and low privileges on the target site, an attacker typically delivers a crafted link via phishing, social engineering, or an embedded resource. When the victim triggers the request, the payload executes under the origin of the vulnerable WordPress site.

The scope change indicates the injected script can affect data or functionality outside the plugin's own security scope, including the broader WordPress admin context.

Root Cause

The root cause is failure to properly neutralize user-controlled input before including it in page output. Input passed through request parameters is reflected into the generated HTML or JavaScript without escaping characters such as <, >, ", and '. This allows attacker-controlled data to be interpreted as executable script rather than inert text.

Attack Vector

Exploitation follows the standard reflected XSS pattern for WordPress plugins:

The attacker identifies a plugin endpoint that reflects request input into the response.
The attacker crafts a URL containing a JavaScript payload in a vulnerable parameter.
The attacker delivers the URL to an authenticated WordPress user (contributor, editor, or administrator).
When the victim loads the URL, the payload executes in their browser under the site's origin.

Technical details are documented in the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-22697

Indicators of Compromise

HTTP requests to responsive-block-editor-addons plugin endpoints containing URL-encoded <script>, javascript:, or onerror= payloads in query parameters.
Web server access logs showing suspicious referrers followed by unexpected administrative actions from authenticated WordPress sessions.
Unexpected outbound requests from browsers of WordPress users immediately after visiting a crafted link.

Detection Strategies

Inspect WordPress access logs for GET or POST requests to plugin routes containing encoded HTML control characters or JavaScript event handlers.
Deploy Web Application Firewall (WAF) rules that flag reflected XSS patterns targeting the responsive-block-editor-addons plugin path.
Enumerate installed plugin versions across the WordPress estate and flag any instance running 1.9.9 or earlier.

Monitoring Recommendations

Monitor WordPress user activity logs for privilege changes, new administrator accounts, or unexpected content modifications following link clicks.
Alert on browser console errors or Content Security Policy (CSP) violations originating from WordPress admin sessions.
Track referrer headers pointing to external domains preceding sensitive administrative requests.

How to Mitigate CVE-2025-22697

Immediate Actions Required

Update the CyberChimps Responsive Blocks plugin to the latest patched version available beyond 1.9.9.
Audit WordPress user accounts and revoke unnecessary contributor, editor, or administrator privileges.
Enforce a strict Content Security Policy (CSP) that blocks inline script execution from untrusted sources.
Require multi-factor authentication (MFA) for all WordPress users with content publishing or higher privileges.

Patch Information

Refer to the Patchstack Vulnerability Report for the fixed version and vendor guidance. Site operators should verify their installed version through the WordPress admin plugin dashboard and apply the update through the standard plugin update mechanism.

Workarounds

Deactivate the Responsive Blocks plugin until a patched version is installed if immediate updating is not feasible.
Configure a WAF rule to block requests to plugin endpoints containing HTML tag characters or JavaScript scheme references.
Train users with WordPress access to avoid clicking unsolicited links to their own site's admin area.

bash

# Configuration example: Check installed plugin version via WP-CLI
wp plugin get responsive-block-editor-addons --field=version

# Update the plugin to the latest available version
wp plugin update responsive-block-editor-addons

# If patch is not yet available, deactivate the plugin
wp plugin deactivate responsive-block-editor-addons