CVE-2025-31734
📋 TL;DR
This DOM-based XSS vulnerability in the Simple Post Expiration WordPress plugin allows attackers to inject malicious scripts that execute in users' browsers when viewing affected pages. All WordPress sites using vulnerable versions of this plugin are affected, potentially compromising user sessions and site integrity.
💻 Affected Systems
- Simple Post Expiration 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 credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Session hijacking, cookie theft, and limited defacement of vulnerable pages.
If Mitigated
Minimal impact with proper input validation and output encoding in place.
🎯 Exploit Status
DOM-based XSS typically requires user interaction but can be triggered via crafted links or forms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Simple Post Expiration. 4. Click 'Update Now' if available. 5. If no update appears, deactivate and delete the plugin, then install fresh version from WordPress repository.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily deactivate the vulnerable plugin until patched.
wp plugin deactivate simple-post-expiration
Content Security Policy
allImplement CSP headers to restrict script execution.
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) with XSS protection rules.
- Disable plugin functionality and use alternative post expiration solutions.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Simple Post Expiration for version number. If version is 1.0.1 or earlier, you are vulnerable.Check Version:
wp plugin get simple-post-expiration --field=versionVerify Fix Applied:
After update, verify plugin version shows 1.0.2 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests with script tags or JavaScript payloads to plugin endpoints
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests containing malicious script payloads targeting /wp-content/plugins/simple-post-expiration/
SIEM Query:
source="web_logs" AND (uri_path="*simple-post-expiration*" AND (http_method="POST" OR http_method="GET") AND (content="<script>" OR content="javascript:" OR content="onerror=" OR content="onload="))