CVE-2025-23650: Tidy.ro Plugin Reflected XSS Vulnerability

CVE-2025-23650 Overview

CVE-2025-23650 is a Reflected Cross-Site Scripting (XSS) vulnerability discovered in the Tidy.ro WordPress plugin developed by razvypp. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser session.

Critical Impact

Attackers can execute arbitrary JavaScript in victims' browsers, potentially leading to session hijacking, credential theft, and unauthorized actions on behalf of authenticated users.

Affected Products

• WordPress Tidy.ro Plugin version 1.3 and earlier
• All installations of the tidyro WordPress plugin up to and including version 1.3

Discovery Timeline

• 2025-02-14 - CVE-2025-23650 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-23650

Vulnerability Analysis

This vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), commonly known as Cross-Site Scripting. The Tidy.ro plugin fails to properly sanitize user-controlled input before reflecting it back to the user's browser within the generated HTML content. This allows an attacker to craft malicious URLs containing JavaScript payloads that execute when a victim clicks the link.

Reflected XSS attacks require user interaction, as the victim must be tricked into visiting a specially crafted URL. However, the network-based attack vector with no authentication requirements makes this vulnerability relatively easy to exploit through phishing campaigns or social engineering tactics.

Root Cause

The root cause lies in insufficient input validation and output encoding within the Tidy.ro plugin. When the plugin processes user-supplied parameters, it directly incorporates this input into the HTML response without proper sanitization or encoding. This allows script tags and JavaScript event handlers to be injected and executed by the browser.

Attack Vector

The attack is network-based and requires user interaction. An attacker crafts a malicious URL containing JavaScript payload in one of the plugin's vulnerable parameters. When a victim clicks this link, the malicious script executes within their browser session under the context of the WordPress site.

The exploitation flow typically involves:

1. Attacker identifies a vulnerable parameter in the Tidy.ro plugin that reflects user input
2. Attacker crafts a malicious URL containing JavaScript payload (e.g., <script> tags or event handlers)
3. Attacker distributes the malicious URL via phishing emails, social media, or other channels
4. Victim clicks the link while authenticated to the WordPress site
5. The injected JavaScript executes in the victim's browser with their session privileges

For detailed technical information, see the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-23650

Indicators of Compromise

• Unusual URL parameters containing encoded JavaScript or HTML tags in requests to WordPress pages using the Tidy.ro plugin
• Web server logs showing requests with suspicious payload patterns such as <script>, javascript:, or event handlers like onerror, onload
• User reports of unexpected browser behavior or redirect warnings when accessing the WordPress site
• Session anomalies indicating potential token theft following user interaction with suspicious links

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common XSS payload patterns in URL parameters
• Monitor web server access logs for requests containing encoded script tags or JavaScript keywords
• Deploy browser-based XSS protection headers such as Content-Security-Policy (CSP) to mitigate script execution
• Utilize WordPress security plugins that scan for and alert on known vulnerable plugin versions

Monitoring Recommendations

• Enable verbose logging for WordPress plugin activity, particularly for the Tidy.ro plugin
• Configure SIEM alerts for patterns matching reflected XSS attack signatures in web traffic
• Regularly audit installed WordPress plugins against vulnerability databases like Patchstack
• Monitor for unusual JavaScript execution patterns or external script loading attempts

How to Mitigate CVE-2025-23650

Immediate Actions Required

• Deactivate and remove the Tidy.ro plugin (version 1.3 and below) from WordPress installations until a patched version is available
• Review web server logs for evidence of exploitation attempts targeting the plugin
• Implement Content-Security-Policy headers to restrict inline script execution
• Consider deploying a Web Application Firewall with XSS protection rules

Patch Information

At the time of publication, no patch has been confirmed for this vulnerability. The issue affects Tidy.ro plugin versions through 1.3. Website administrators should monitor the Patchstack WordPress Vulnerability Report for updates on available fixes.

Workarounds

• Disable or uninstall the Tidy.ro plugin until a security patch is released
• Implement strict Content-Security-Policy headers that prevent inline script execution
• Deploy WAF rules to filter requests containing potential XSS payloads
• Use WordPress security plugins to add additional input sanitization layers

# Add Content-Security-Policy header 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';"

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