CVE-2025-30607: Quick Localization XSS Vulnerability

CVE-2025-30607 Overview

CVE-2025-30607 is a Reflected Cross-Site Scripting (XSS) vulnerability affecting the WordPress Quick Localization plugin by Name.ly. The vulnerability stems from improper neutralization of 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 code in the browsers of users who click on maliciously crafted links, potentially leading to session hijacking, credential theft, or malicious actions performed on behalf of authenticated users.

Affected Products

• WordPress Quick Localization plugin version 0.1.0 and earlier

Discovery Timeline

• 2025-04-01 - CVE-2025-30607 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-30607

Vulnerability Analysis

This Reflected XSS vulnerability occurs when the Quick Localization plugin fails to properly sanitize user-supplied input before reflecting it back in the HTTP response. When a user visits a specially crafted URL containing malicious JavaScript payload, the plugin includes this unsanitized input directly in the rendered page, causing the browser to execute the attacker's script.

The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). This flaw enables attackers to bypass the same-origin policy and execute code within the security context of the vulnerable WordPress site.

Root Cause

The root cause is insufficient input validation and output encoding within the Quick Localization plugin. User-controlled data is passed through request parameters and directly embedded into HTML output without proper sanitization or escaping. This allows special characters like <, >, ", and ' to be interpreted as HTML/JavaScript code rather than being treated as literal text.

Attack Vector

The attack requires user interaction—specifically, the victim must click on a malicious link crafted by the attacker. The attack is network-based and does not require authentication or special privileges. An attacker would typically distribute the malicious URL through phishing emails, social media posts, or compromised websites.

The malicious URL contains a JavaScript payload embedded in a vulnerable parameter. When clicked, the victim's browser sends the request to the WordPress site, which reflects the payload back in the response without sanitization, causing script execution in the victim's browser context.

Detection Methods for CVE-2025-30607

Indicators of Compromise

• Unusual URL parameters containing JavaScript code or HTML tags in WordPress access logs
• HTTP requests to the Quick Localization plugin endpoints with encoded script payloads (e.g., %3Cscript%3E)
• User reports of unexpected behavior or redirects when accessing WordPress admin pages

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common XSS payload patterns in URL parameters
• Monitor web server access logs for suspicious query strings containing <script>, javascript:, or encoded variants
• Implement Content Security Policy (CSP) headers to restrict inline script execution and detect violation attempts

Monitoring Recommendations

• Enable verbose logging for the Quick Localization plugin and review for anomalous requests
• Configure security information and event management (SIEM) alerts for XSS-related patterns targeting WordPress installations
• Regularly audit installed plugins against vulnerability databases like Patchstack

How to Mitigate CVE-2025-30607

Immediate Actions Required

• Remove or deactivate the Quick Localization plugin (quick-localization) immediately if it is not essential to site functionality
• Review WordPress user accounts and sessions for any signs of compromise following potential exploitation
• Implement Content Security Policy (CSP) headers to mitigate the impact of XSS attacks as a defense-in-depth measure

Patch Information

At the time of publication, no official patch has been released for this vulnerability. The affected version 0.1.0 remains vulnerable. Organizations should monitor the plugin developer and the Patchstack Vulnerability Report for security updates.

Workarounds

• Disable the Quick Localization plugin until a patched version becomes available
• Deploy a Web Application Firewall (WAF) with XSS filtering rules to block malicious requests
• Implement strict Content Security Policy headers to prevent inline script execution:

# Apache .htaccess configuration example
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'"

# Nginx configuration example
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'";