CVE-2025-39414
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the WordPress spam-stopper plugin allows attackers to perform actions as authenticated users, leading to stored cross-site scripting (XSS). This affects WordPress sites using spam-stopper plugin versions up to 3.1.3. Attackers can inject malicious scripts that execute when other users view affected pages.
💻 Affected Systems
- WordPress spam-stopper plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could inject persistent malicious scripts that steal admin credentials, deface websites, redirect users to malicious sites, or perform administrative actions on the WordPress site.
Likely Case
Attackers inject malicious JavaScript that steals session cookies or credentials from logged-in users, potentially compromising WordPress admin accounts.
If Mitigated
With proper CSRF protections and content security policies, the attack surface is reduced, though the vulnerability still exists in the codebase.
🎯 Exploit Status
CSRF to XSS chain is well-understood attack pattern. Requires social engineering to trick authenticated users.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find spam-stopper plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and remove plugin, then install fresh version from WordPress repository.
🔧 Temporary Workarounds
Disable spam-stopper plugin
allTemporarily disable the vulnerable plugin until patched version is available
wp plugin deactivate spam-stopper
Implement CSRF protection headers
allAdd Content Security Policy headers to limit script execution
Add to .htaccess: Header set Content-Security-Policy "script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "script-src 'self'";
🧯 If You Can't Patch
- Disable spam-stopper plugin immediately
- Implement web application firewall rules to block suspicious POST requests to WordPress admin endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for spam-stopper version. If version is 3.1.3 or earlier, system is vulnerable.Check Version:
wp plugin get spam-stopper --field=versionVerify Fix Applied:
Verify spam-stopper plugin version is 3.1.4 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php endpoints
- Multiple failed CSRF token validations in WordPress debug logs
- Unexpected plugin activation/deactivation events
Network Indicators:
- Cross-origin requests to WordPress admin endpoints without proper referrer headers
- Suspicious JavaScript payloads in POST parameters
SIEM Query:
source="wordpress.log" AND ("admin-ajax.php" OR "admin-post.php") AND (POST) AND NOT referer="*wp-admin*"