CVE-2025-28872
📋 TL;DR
This CVE describes a missing authorization vulnerability in the WordPress plugin Block Spam By Math Reloaded that allows attackers to access functionality not properly constrained by access controls. It affects all WordPress sites using this plugin from any version up to 2.2.4. Attackers could potentially perform unauthorized actions that should require proper authentication.
💻 Affected Systems
- WordPress Block Spam By Math Reloaded plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could modify plugin settings, disable spam protection, or potentially access administrative functions depending on what functionality is exposed through the broken access control.
Likely Case
Attackers could disable or modify the spam protection functionality, allowing spam submissions through forms protected by the plugin.
If Mitigated
With proper network segmentation and web application firewalls, the impact would be limited to the specific WordPress instance only.
🎯 Exploit Status
Missing authorization vulnerabilities typically require minimal technical skill to exploit once the vulnerable endpoint is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Block Spam By Math Reloaded'. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 2.2.5+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the Block Spam By Math Reloaded plugin until patched
wp plugin deactivate block-spam-by-math-reloaded
Implement web application firewall rule
linuxBlock access to vulnerable plugin endpoints
# Add to .htaccess for Apache:
RewriteCond %{REQUEST_URI} ^/wp-content/plugins/block-spam-by-math-reloaded/.*
RewriteRule ^ - [F]
🧯 If You Can't Patch
- Disable the Block Spam By Math Reloaded plugin immediately
- Implement network segmentation to isolate the WordPress instance and deploy a web application firewall
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for 'Block Spam By Math Reloaded' version 2.2.4 or earlierCheck Version:
wp plugin get block-spam-by-math-reloaded --field=versionVerify Fix Applied:
Verify plugin version is 2.2.5 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests to /wp-content/plugins/block-spam-by-math-reloaded/ endpoints from unauthorized users
- Multiple failed authentication attempts followed by successful plugin configuration changes
Network Indicators:
- HTTP requests to plugin admin endpoints without proper authentication headers
- Unusual traffic patterns to WordPress plugin directories
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-content/plugins/block-spam-by-math-reloaded/*" AND NOT user_role="administrator")