CVE-2025-11994
📋 TL;DR
The Easy Email Subscription WordPress plugin has a stored XSS vulnerability in the 'name' parameter that allows unauthenticated attackers to inject malicious scripts. These scripts execute whenever users view compromised pages, potentially affecting all visitors of vulnerable WordPress sites.
💻 Affected Systems
- Easy Email Subscription 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 steal session cookies, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users.
Likely Case
Attackers inject malicious scripts to steal user session cookies or redirect visitors to phishing sites.
If Mitigated
With proper input validation and output escaping, the vulnerability would be prevented entirely.
🎯 Exploit Status
Stored XSS vulnerabilities are commonly exploited and require minimal technical skill to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.3
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Easy Email Subscription' plugin. 4. Click 'Update Now' if update available. 5. If no update, deactivate and delete plugin immediately.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily deactivate the plugin until patched version is available
wp plugin deactivate email-subscription-with-secure-captcha
Apply WAF rules
allBlock malicious input patterns in the 'name' parameter
🧯 If You Can't Patch
- Deactivate and remove the Easy Email Subscription plugin immediately
- Implement Content Security Policy (CSP) headers to mitigate XSS impact
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for 'Easy Email Subscription' version 1.3 or earlierCheck Version:
wp plugin get email-subscription-with-secure-captcha --field=versionVerify Fix Applied:
Verify plugin version is higher than 1.3 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to subscription forms with script tags in parameters
- Multiple failed subscription attempts with malicious payloads
Network Indicators:
- HTTP requests containing script tags in 'name' parameter to subscription endpoints
SIEM Query:
source="wordpress" AND (parameter="name" AND value CONTAINS "<script>")🔗 References
- https://plugins.svn.wordpress.org/email-subscription-with-secure-captcha/tags/1.3/simple-email-subscription.php
- https://plugins.svn.wordpress.org/email-subscription-with-secure-captcha/tags/1.3/subscriber-form.php
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3388578%40email-subscription-with-secure-captcha&new=3388578%40email-subscription-with-secure-captcha&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b5bb14c1-8713-4aa1-b50a-53bed07a5f80?source=cve
