CVE-2025-23858
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the Custom Users Order WordPress plugin. When users visit a specially crafted URL, the script executes in their browser, potentially stealing credentials or performing actions on their behalf. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Custom Users Order 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 administrator session cookies, take over WordPress sites, deface websites, or redirect visitors to malicious sites.
Likely Case
Attackers steal user session cookies or credentials, perform actions as authenticated users, or redirect users to phishing pages.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking malicious link), but exploitation is straightforward once the malicious URL is crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Custom Users Order' and check for updates. 4. If update available, click 'Update Now'. 5. If no update available, deactivate and remove the plugin.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate custom-users-order
Web Application Firewall
allDeploy WAF rules to block XSS payloads targeting this plugin
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions that block reflected XSS attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Custom Users Order versionCheck Version:
wp plugin get custom-users-order --field=versionVerify Fix Applied:
Verify plugin version is 4.3 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests with script tags or JavaScript in URL parameters
- Multiple failed login attempts after suspicious URL visits
Network Indicators:
- HTTP requests containing <script> tags or JavaScript in query strings
- Traffic patterns showing users being redirected to external sites
SIEM Query:
source="wordpress.log" AND ("custom-users-order" OR "custom_users_order") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")