CVE-2025-46435: Time Based Greeting CSRF Vulnerability

CVE-2025-46435 Overview

CVE-2025-46435 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the WordPress Time Based Greeting plugin by Yash Binani. This security flaw enables attackers to chain CSRF with Stored Cross-Site Scripting (XSS), allowing malicious actors to inject persistent JavaScript code into the WordPress site by tricking an authenticated administrator into performing unintended actions.

Critical Impact

Attackers can leverage CSRF to inject persistent malicious scripts into the WordPress site, potentially compromising administrator sessions, stealing credentials, or distributing malware to site visitors.

Affected Products

• Time Based Greeting WordPress Plugin versions up to and including 2.2.2
• WordPress installations using the vulnerable time-based-greeting plugin

Discovery Timeline

• 2025-04-24 - CVE-2025-46435 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-46435

Vulnerability Analysis

This vulnerability combines two attack vectors: Cross-Site Request Forgery (CSRF) and Stored Cross-Site Scripting (XSS). The plugin fails to implement proper CSRF protection mechanisms (such as nonce verification) on forms that accept user input for greeting messages. This allows attackers to craft malicious requests that, when executed by an authenticated administrator, inject JavaScript payloads into the plugin's stored settings.

The chained nature of this vulnerability makes it particularly dangerous. The CSRF component bypasses the authentication requirement, while the Stored XSS component ensures the malicious payload persists and executes whenever any user (including other administrators or visitors) views pages containing the greeting functionality.

Root Cause

The root cause stems from inadequate security controls in the plugin's form handling logic. Specifically, the plugin lacks proper CSRF token validation (WordPress nonces) when processing administrative settings updates. Combined with insufficient input sanitization and output encoding, this allows arbitrary script content to be stored in the database and rendered without proper escaping.

Attack Vector

An attacker would craft a malicious HTML page containing a hidden form that submits a request to the vulnerable plugin's settings endpoint. When an authenticated WordPress administrator visits this malicious page (through phishing, social engineering, or a compromised website), the form automatically submits, updating the plugin settings with the attacker's XSS payload. Since the payload is stored in the database, it executes every time the affected page loads, impacting all subsequent visitors.

The attack requires no prior authentication from the attacker—only that the victim administrator is logged into WordPress and visits the attacker-controlled page. This makes it an effective vector for targeting WordPress administrators through social engineering campaigns.

Detection Methods for CVE-2025-46435

Indicators of Compromise

• Unexpected or suspicious JavaScript code in Time Based Greeting plugin settings
• Unusual outbound network connections from the WordPress admin panel
• Modified plugin options in the wp_options database table related to time-based-greeting
• Browser console errors or unexpected script execution on pages displaying greeting messages

Detection Strategies

• Monitor WordPress admin activity logs for unauthorized settings changes to the Time Based Greeting plugin
• Implement Content Security Policy (CSP) headers to detect and block inline script execution
• Review database entries for the plugin's options containing script tags or event handlers
• Deploy Web Application Firewall (WAF) rules to detect CSRF and XSS attack patterns

Monitoring Recommendations

• Enable WordPress audit logging to track all plugin configuration changes
• Configure alerts for modifications to plugin settings outside normal administrative workflows
• Regularly scan stored content for malicious JavaScript patterns using security plugins
• Monitor server access logs for suspicious POST requests to plugin endpoints

How to Mitigate CVE-2025-46435

Immediate Actions Required

• Deactivate and remove the Time Based Greeting plugin until a patched version is available
• Review and sanitize existing plugin settings to remove any potentially injected scripts
• Audit WordPress admin accounts for suspicious activity
• Implement a Web Application Firewall with CSRF and XSS protection rules

Patch Information

Check the Patchstack WordPress Vulnerability Report for the latest patch status and updates from the plugin developer. Monitor the WordPress plugin repository for version updates beyond 2.2.2 that address this vulnerability.

Workarounds

• Remove the vulnerable plugin entirely if greeting functionality is not essential
• Implement server-level CSRF protection using web server modules or WAF rules
• Restrict access to WordPress admin areas to trusted IP addresses only
• Use browser-based XSS protection headers such as X-XSS-Protection and strict Content-Security-Policy
• Consider alternative greeting plugins with better security practices

# Configuration example - Add to .htaccess or nginx config
# Block external POST requests to plugin settings (temporary mitigation)
# Apache .htaccess example
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{REQUEST_METHOD} POST
    RewriteCond %{HTTP_REFERER} !^https?://(www\.)?yourdomain\.com [NC]
    RewriteCond %{REQUEST_URI} time-based-greeting [NC]
    RewriteRule .* - [F,L]
</IfModule>