CVE-2025-49344: SensitiveTagCloud CSRF Vulnerability

CVE-2025-49344 Overview

CVE-2025-49344 is a Cross-Site Request Forgery (CSRF) vulnerability in the SensitiveTagCloud WordPress plugin (sensitive-tag-cloud) developed by reneade. This vulnerability allows attackers to perform Stored Cross-Site Scripting (XSS) attacks through CSRF exploitation. The vulnerability affects all versions of SensitiveTagCloud from initial release through version 1.4.1.

The attack chain involves tricking an authenticated administrator into visiting a malicious page that submits crafted requests to the vulnerable plugin, ultimately injecting persistent malicious scripts into the WordPress site.

Critical Impact

Attackers can chain CSRF with Stored XSS to compromise WordPress administrator sessions, inject malicious content, and potentially achieve full site compromise through unauthorized administrative actions.

Affected Products

• SensitiveTagCloud WordPress Plugin versions up to and including 1.4.1
• WordPress installations with the sensitive-tag-cloud plugin active
• Sites where administrators access untrusted external links while authenticated

Discovery Timeline

• 2025-12-31 - CVE-2025-49344 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-49344

Vulnerability Analysis

This vulnerability combines two distinct attack vectors: Cross-Site Request Forgery (CSRF) and Stored Cross-Site Scripting (XSS). The SensitiveTagCloud plugin fails to implement proper CSRF token validation on administrative form submissions, allowing attackers to craft malicious requests that are executed in the context of an authenticated administrator's session.

When an administrator visits an attacker-controlled page while logged into WordPress, the malicious page can submit requests to the plugin's administrative endpoints without proper authorization checks. The injected payload is then stored persistently in the database, affecting all subsequent visitors to pages displaying the tag cloud widget.

The vulnerability exists due to missing nonce verification in plugin settings handlers, combined with insufficient output sanitization when rendering stored configuration data. This allows malicious JavaScript to be stored and subsequently executed in the browsers of site visitors and administrators.

Root Cause

The root cause of CVE-2025-49344 stems from two fundamental security failures in the SensitiveTagCloud plugin:

1. Missing CSRF Protection: The plugin's administrative endpoints do not verify WordPress nonces, allowing cross-origin requests to modify plugin settings when an administrator is authenticated.

2. Insufficient Input Sanitization: User-supplied input stored in plugin configuration is not properly sanitized before being saved to the database, enabling XSS payload persistence.

3. Inadequate Output Encoding: When rendering the tag cloud widget, stored configuration values are output without proper escaping, executing any injected scripts in the visitor's browser context.

Attack Vector

The attack requires network access and user interaction. An attacker must craft a malicious webpage containing hidden forms or JavaScript that automatically submits requests to the WordPress plugin's administrative endpoints. The attack flow proceeds as follows:

1. Attacker identifies a target WordPress site running the vulnerable SensitiveTagCloud plugin
2. Attacker creates a malicious webpage hosting a CSRF payload targeting the plugin's settings page
3. Attacker social engineers a WordPress administrator into visiting the malicious page
4. The administrator's browser automatically submits the CSRF request, injecting malicious JavaScript into plugin settings
5. The stored XSS payload executes whenever the tag cloud widget is rendered, affecting all site visitors

The Stored XSS component enables persistent compromise, allowing attackers to steal administrator session cookies, redirect users to phishing sites, inject cryptocurrency miners, or deface the website content.

Detection Methods for CVE-2025-49344

Indicators of Compromise

• Unexpected modifications to SensitiveTagCloud plugin settings in the WordPress database
• Presence of JavaScript code or HTML tags in plugin configuration fields
• Suspicious outbound connections from visitor browsers to unknown external domains
• Administrator session tokens appearing in server logs from unexpected IP addresses
• Reports of unexpected redirects or pop-ups from site visitors

Detection Strategies

• Monitor WordPress database tables for unexpected script tags or JavaScript in plugin option values
• Implement Content Security Policy (CSP) headers to detect and block unauthorized inline scripts
• Review Apache/Nginx access logs for suspicious POST requests to plugin administrative endpoints without referrer validation
• Deploy Web Application Firewall (WAF) rules to detect CSRF and XSS attack patterns targeting WordPress plugins
• Use browser-based XSS auditing tools to scan rendered pages for injected scripts

Monitoring Recommendations

• Enable WordPress audit logging to track all plugin settings changes with timestamp and user attribution
• Configure alerts for modifications to the sensitive-tag-cloud options in the wp_options table
• Monitor for suspicious administrator activity patterns, especially settings changes following visits to external sites
• Implement real-time scanning of stored content for known XSS patterns and indicators

How to Mitigate CVE-2025-49344

Immediate Actions Required

• Deactivate the SensitiveTagCloud plugin immediately if running version 1.4.1 or earlier
• Review plugin settings for any injected malicious content and remove suspicious entries
• Audit WordPress administrator accounts for signs of compromise and rotate credentials if necessary
• Implement a Web Application Firewall with CSRF and XSS protection rules
• Consider replacing the plugin with an alternative tag cloud solution that is actively maintained

Patch Information

As of the last NVD update on 2026-04-23, administrators should check the Patchstack Vulnerability Advisory for the latest remediation guidance and any available patches from the plugin developer.

If no patch is available, complete removal of the plugin is recommended until the developer addresses the vulnerability with proper CSRF token validation and input/output sanitization.

Workarounds

• Remove or deactivate the SensitiveTagCloud plugin until a patched version is released
• Implement server-side Content Security Policy headers to mitigate XSS execution risk
• Restrict WordPress admin access to trusted IP addresses only using .htaccess or server configuration
• Install a WordPress security plugin that provides CSRF and XSS protection at the application level
• Educate administrators to avoid clicking untrusted links while logged into WordPress

# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate sensitive-tag-cloud

# Check for suspicious content in plugin options
wp option get sensitive_tag_cloud_options

# Enable maintenance mode while investigating
wp maintenance-mode activate