CVE-2025-58018
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Mail Subscribe List WordPress plugin allows attackers to inject malicious scripts that execute when other users view affected pages. All WordPress sites using vulnerable versions of this plugin are affected. The vulnerability enables attackers to steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- WordPress Mail Subscribe List 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 administrator credentials, take over the WordPress site, install backdoors, or redirect visitors to malicious sites, potentially compromising the entire web server and user data.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, potentially gaining unauthorized access to user accounts and performing actions on their behalf within the WordPress site.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing any impact beyond failed injection attempts.
🎯 Exploit Status
Exploitation requires finding the vulnerable input field and crafting appropriate XSS payloads. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 2.1.10
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Mail Subscribe List' and click 'Update Now'. 4. If update not available, deactivate and delete the plugin, then install the latest version from WordPress repository.
🔧 Temporary Workarounds
Input Sanitization
allManually add input validation and output encoding to plugin files to neutralize malicious scripts
🧯 If You Can't Patch
- Disable or remove the Mail Subscribe List plugin immediately
- Implement a web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for Mail Subscribe List version 2.1.10 or earlierCheck Version:
wp plugin list --name='mail-subscribe-list' --field=versionVerify Fix Applied:
Verify plugin version is higher than 2.1.10 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints containing script tags or JavaScript code
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests containing common XSS payload patterns to plugin-specific URLs
SIEM Query:
source="web_server_logs" AND (uri="*mail-subscribe-list*" OR uri="*subscribe*" OR uri="*mailing*list*") AND (body="*<script>*" OR body="*javascript:*" OR body="*onload=*" OR body="*onerror=*")