CVE-2025-48308
📋 TL;DR
This CVE describes a Cross-Site Request Forgery (CSRF) vulnerability in the Newsletter subscription optin module WordPress plugin that can lead to Stored Cross-Site Scripting (XSS). Attackers can trick authenticated administrators into executing malicious actions, potentially injecting persistent scripts into the website. This affects WordPress sites using vulnerable versions of the Newsletter subscription optin module plugin.
💻 Affected Systems
- Newsletter subscription optin module WordPress 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 malicious JavaScript that steals administrator credentials, redirects users to malicious sites, or takes full control of the WordPress site when administrators view affected pages.
Likely Case
Attackers create fake forms or links that trick logged-in administrators into unknowingly submitting malicious requests, leading to script injection in newsletter subscription forms visible to all users.
If Mitigated
With proper CSRF tokens and input validation, the attack would fail at the initial request stage, preventing any script injection.
🎯 Exploit Status
CSRF to XSS chain is well-understood attack pattern. Exploitation requires tricking authenticated administrator but uses standard web techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.0 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find 'Newsletter subscription optin module'. 4. Click 'Update Now' if available. 5. If no update available, deactivate and delete the plugin, then install version 1.3.0+ from WordPress repository.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched version is available
wp plugin deactivate newsletter-subscription-optin-module
CSRF Protection via .htaccess
linuxAdd basic CSRF protection headers at web server level
Header set X-Frame-Options "DENY"
Header set Content-Security-Policy "frame-ancestors 'none'"
🧯 If You Can't Patch
- Disable the Newsletter subscription optin module plugin completely
- Implement web application firewall (WAF) rules to block CSRF attempts and XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Newsletter subscription optin module → Version. If version is 1.2.9 or earlier, you are vulnerable.Check Version:
wp plugin get newsletter-subscription-optin-module --field=versionVerify Fix Applied:
Verify plugin version is 1.3.0 or later in WordPress admin panel. Test newsletter subscription forms for proper CSRF token implementation.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to newsletter subscription endpoints without referrer headers
- Multiple failed CSRF token validations in WordPress debug logs
- JavaScript injection attempts in form submission logs
Network Indicators:
- CSRF attack patterns with forged requests from external domains
- Unexpected iframe or form submissions to admin-ajax.php or plugin endpoints
SIEM Query:
source="wordpress.log" AND ("CSRF token" OR "nonce verification failed") AND "newsletter-subscription"