CVE-2025-28857
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the Rankchecker.io Integration WordPress plugin allows attackers to perform unauthorized actions as authenticated users, which can lead to stored cross-site scripting (XSS). This affects WordPress sites using the Rankchecker.io Integration plugin versions up to 1.0.9. Attackers can inject malicious scripts that execute when other users view affected pages.
💻 Affected Systems
- Rankchecker.io Integration WordPress Plugin
📦 What is this software?
Rankchecker by Rankchecker
⚠️ Risk & Real-World Impact
Worst Case
Attackers could inject persistent malicious scripts that steal administrator credentials, hijack user sessions, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers trick authenticated users into performing unintended actions that inject malicious scripts, leading to session hijacking, credential theft, or content manipulation for users viewing affected pages.
If Mitigated
With proper CSRF protections and input validation, the attack surface is significantly reduced, though the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation requires tricking an authenticated user into visiting a malicious page or clicking a crafted link. The CSRF leads to stored XSS payload injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.0.9
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Rankchecker.io Integration'. 4. Click 'Update Now' if available. 5. If no update is available, deactivate and delete the plugin, then find a secure alternative.
🔧 Temporary Workarounds
Implement CSRF Tokens Manually
allAdd CSRF protection tokens to forms and validate them on submission
Disable Plugin
WordPressDeactivate the Rankchecker.io Integration plugin until patched
wp plugin deactivate rankchecker-io-integration
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block CSRF attempts and XSS payloads
- Restrict plugin access to trusted users only and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'Rankchecker.io Integration' version 1.0.9 or earlierCheck Version:
wp plugin get rankchecker-io-integration --field=versionVerify Fix Applied:
Verify plugin version is higher than 1.0.9 in WordPress admin panel or check that the plugin is deactivated/removed📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints without referrer headers
- Multiple failed CSRF token validations
- Unexpected script tags in database content
Network Indicators:
- HTTP requests with suspicious parameters containing script tags or JavaScript
- Requests from unexpected origins to plugin admin endpoints
SIEM Query:
source="wordpress.log" AND (plugin="rankchecker-io-integration" AND (method="POST" AND NOT referer="*wp-admin*"))