CVE-2025-22501: Improve My City XSS Vulnerability

CVE-2025-22501 Overview

CVE-2025-22501 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the Improve My City WordPress plugin. The vulnerability stems from improper neutralization of script-related HTML tags in web page input, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

This WordPress plugin, designed for citizen engagement and reporting civic issues, fails to properly sanitize user-supplied input before reflecting it back to the user's browser. This enables attackers to craft malicious URLs containing JavaScript payloads that, when clicked by unsuspecting users, execute arbitrary scripts within the context of the affected WordPress site.

Critical Impact

Attackers can steal session cookies, hijack user accounts, redirect users to malicious sites, deface web content, or perform actions on behalf of authenticated users including WordPress administrators.

Affected Products

• WordPress Improve My City plugin version 1.6 and earlier
• All WordPress installations using vulnerable versions of the improve-my-city plugin

Discovery Timeline

• 2025-03-28 - CVE-2025-22501 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-22501

Vulnerability Analysis

This vulnerability is classified under CWE-80 (Improper Neutralization of Script-Related HTML Tags in a Web Page), a specific variant of basic XSS attacks. The Improve My City plugin fails to adequately sanitize or encode user-controlled input before rendering it within HTML responses.

Reflected XSS vulnerabilities occur when an application takes untrusted data from a request and includes it in the immediate response without proper validation or escaping. In this case, the plugin processes user input in a way that allows script-related HTML tags to pass through unfiltered, enabling attackers to inject executable JavaScript code.

The vulnerability requires user interaction—a victim must click a malicious link or visit a crafted URL for the attack to succeed. However, the scope is changed (S:C in the CVSS vector), meaning the vulnerable component and impacted component are different, potentially allowing attackers to affect resources beyond the security scope of the vulnerable application.

Root Cause

The root cause lies in the plugin's failure to implement proper input validation and output encoding mechanisms. The Improve My City plugin does not adequately sanitize script-related HTML tags from user-supplied input before including that input in dynamically generated web pages.

WordPress provides built-in escaping functions such as esc_html(), esc_attr(), and wp_kses() specifically designed to prevent XSS attacks. The vulnerable code paths in this plugin appear to bypass or omit these security controls, allowing raw HTML and JavaScript to be reflected back to users.

Attack Vector

The attack is network-based and requires no authentication. An attacker crafts a malicious URL containing a JavaScript payload embedded within a vulnerable parameter. This URL is then distributed to potential victims through phishing emails, social media, forum posts, or other means.

When a victim clicks the malicious link, the Improve My City plugin processes the request and reflects the attacker's script back in the response page. The victim's browser, trusting the legitimate WordPress domain, executes the malicious JavaScript with full access to the page context, cookies, and session data.

The attack mechanism involves embedding JavaScript code within URL parameters that the plugin handles improperly. For detailed technical information and proof-of-concept examples, security researchers should consult the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-22501

Indicators of Compromise

• Unusual URL parameters containing encoded JavaScript or HTML tags in requests to the Improve My City plugin endpoints
• Web server access logs showing requests with suspicious characters such as <script>, javascript:, onerror=, or onload= in query strings
• Reports from users about unexpected browser behavior or pop-ups when interacting with the Improve My City functionality
• Browser console errors or Content Security Policy violation reports related to inline script execution

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payload patterns in HTTP requests
• Enable WordPress security plugins with real-time scanning capabilities to monitor for known vulnerability patterns
• Review web server access logs for URLs containing common XSS attack signatures targeting the improve-my-city plugin paths
• Deploy browser-based Content Security Policy (CSP) headers to detect and report attempted script injections

Monitoring Recommendations

• Configure WordPress audit logging to track all requests to the Improve My City plugin endpoints
• Set up automated alerts for URLs containing potential XSS indicators such as encoded brackets, script tags, or event handlers
• Monitor for unusual patterns of requests from single IP addresses targeting plugin-specific URLs
• Implement SIEM rules to correlate potential XSS attempts with subsequent session anomalies

How to Mitigate CVE-2025-22501

Immediate Actions Required

• Deactivate and remove the Improve My City plugin from WordPress installations until a patched version is available
• Review WordPress user accounts and sessions for any signs of unauthorized access or privilege escalation
• Implement Content Security Policy (CSP) headers to restrict inline script execution as a defense-in-depth measure
• Enable WordPress security plugins with XSS protection capabilities to provide an additional security layer

Patch Information

As of the last NVD update on 2026-04-23, users should check the Patchstack WordPress Vulnerability Report for the latest patch status and remediation guidance. All versions through 1.6 are confirmed vulnerable. Organizations should monitor the WordPress plugin repository for updated versions that address this vulnerability.

Workarounds

• Disable the Improve My City plugin entirely until an official patch is released
• Implement a Web Application Firewall (WAF) with XSS protection rules to filter malicious requests at the network perimeter
• Add strict Content Security Policy headers to your WordPress installation to prevent inline script execution
• Restrict access to the plugin's functionality to authenticated and trusted users only through WordPress role management

# Add Content Security Policy headers to Apache configuration
# Add to .htaccess or Apache virtual host configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; style-src 'self' 'unsafe-inline'"

# For nginx, add to server block
# add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; style-src 'self' 'unsafe-inline'";