CVE-2025-28867
📋 TL;DR
This CSRF vulnerability in the stesvis Frontpage category filter WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions. It affects all WordPress sites using this plugin from initial release through version 1.0.2. The vulnerability requires an authenticated admin session to be exploited.
💻 Affected Systems
- stesvis Frontpage category filter WordPress plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could trick an admin into changing plugin settings, modifying site configuration, or potentially performing other administrative actions depending on plugin capabilities.
Likely Case
Attackers could modify category filter settings, potentially disrupting site functionality or changing content display rules.
If Mitigated
With proper CSRF protections and admin awareness, exploitation attempts would fail or be detected.
🎯 Exploit Status
CSRF attacks typically require social engineering to trick authenticated users into clicking malicious links.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Frontpage category filter'. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched
wp plugin deactivate frontpage-category-filter
CSRF Protection Middleware
allImplement additional CSRF protection at web server or application level
🧯 If You Can't Patch
- Restrict admin access to trusted networks only
- Implement strict SameSite cookie policies and Content Security Policy headers
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Frontpage category filter > Version. If version is 1.0.2 or earlier, you are vulnerable.Check Version:
wp plugin get frontpage-category-filter --field=versionVerify Fix Applied:
After update, verify plugin version shows 1.0.3 or later in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unexpected POST requests to frontpage-category-filter admin endpoints
- Multiple failed CSRF token validations
Network Indicators:
- External domains making requests to admin-ajax.php with frontpage-category-filter actions
- Suspicious referer headers in admin requests
SIEM Query:
source="wordpress.log" AND "frontpage-category-filter" AND ("admin-ajax" OR "wp-admin") AND POST