CVE-2025-22520: Tock Widget CSRF Vulnerability

CVE-2025-22520 Overview

CVE-2025-22520 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Tock Widget WordPress plugin. This vulnerability allows attackers to perform unauthorized actions on behalf of authenticated users by tricking them into executing malicious requests. The CSRF flaw can be chained with Stored Cross-Site Scripting (XSS), significantly amplifying the potential impact.

Critical Impact

Attackers can exploit this CSRF vulnerability to inject persistent malicious scripts into the WordPress site, potentially compromising administrator accounts and site visitors.

Affected Products

• Tock Widget WordPress Plugin version 1.1 and earlier
• WordPress installations with Tock Widget plugin enabled

Discovery Timeline

• 2025-01-07 - CVE-2025-22520 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-22520

Vulnerability Analysis

This vulnerability stems from insufficient CSRF token validation in the Tock Widget plugin's administrative functions. The plugin fails to properly verify the origin of requests made to its settings pages, allowing attackers to craft malicious web pages that submit forged requests when visited by authenticated WordPress administrators.

The vulnerability is particularly dangerous because it chains with a Stored XSS condition. When an attacker successfully exploits the CSRF flaw, they can inject malicious JavaScript that persists in the database. This stored payload then executes in the browsers of any user who views the affected content, including other administrators and site visitors.

Root Cause

The root cause is the absence or improper implementation of WordPress nonce verification on sensitive plugin operations. WordPress provides built-in CSRF protection through its nonce system (wp_nonce_field() and wp_verify_nonce()), but the Tock Widget plugin does not adequately leverage these security mechanisms for state-changing operations in its settings management functions.

Attack Vector

An attacker can exploit this vulnerability by:

1. Creating a malicious HTML page containing a hidden form that targets the vulnerable Tock Widget plugin endpoint
2. Convincing an authenticated WordPress administrator to visit the malicious page while logged in
3. The form automatically submits, carrying the victim's session cookies and authentication
4. The plugin processes the forged request, accepting malicious input including XSS payloads
5. The injected script persists in the WordPress database and executes for subsequent visitors

The vulnerability requires user interaction (visiting a malicious page) and an authenticated session, but the attack can be highly effective through social engineering techniques such as phishing emails containing links to the attacker-controlled page.

Detection Methods for CVE-2025-22520

Indicators of Compromise

• Unexpected changes to Tock Widget plugin settings without administrator action
• Presence of JavaScript code or HTML tags in plugin configuration fields
• Browser console errors or unexpected script execution on pages using the widget
• Unusual outbound network requests from the WordPress site to unknown domains

Detection Strategies

• Review WordPress audit logs for unauthorized plugin settings modifications
• Implement Content Security Policy (CSP) headers to detect and block unauthorized inline scripts
• Monitor for anomalous HTTP POST requests to Tock Widget administrative endpoints
• Scan plugin database entries for suspicious JavaScript or HTML injection patterns

Monitoring Recommendations

• Enable WordPress activity logging with a security plugin to track all administrative actions
• Configure Web Application Firewall (WAF) rules to flag potential CSRF attack patterns
• Implement browser-based XSS detection using CSP report-uri directives
• Regularly audit plugin settings and database content for unauthorized modifications

How to Mitigate CVE-2025-22520

Immediate Actions Required

• Update the Tock Widget plugin to the latest patched version if available
• Temporarily disable the Tock Widget plugin until a security patch is released
• Review and sanitize existing plugin configuration data for any injected malicious content
• Implement a Web Application Firewall with CSRF and XSS protection rules
• Educate administrators about phishing risks and avoiding suspicious links

Patch Information

The vulnerability affects Tock Widget versions through 1.1. Administrators should check the WordPress plugin repository for an updated version that addresses this CSRF vulnerability. For detailed information about the vulnerability and available patches, refer to the Patchstack Vulnerability Report.

Workarounds

• Disable the Tock Widget plugin until an official patch is available
• Implement additional CSRF protection at the server level using security plugins like Wordfence or Sucuri
• Restrict administrative access to trusted IP addresses only
• Use browser extensions that provide additional CSRF protection for administrators
• Consider implementing a custom mu-plugin to add nonce verification to the vulnerable endpoints

# WordPress CLI command to disable the vulnerable plugin
wp plugin deactivate tock-widget

# Verify plugin status
wp plugin list --status=active | grep tock

# Optional: Remove plugin until patched version is available
wp plugin delete tock-widget