CVE-2025-31027
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the Tiger WordPress theme, which are then executed in victims' browsers. It affects all WordPress sites using the Tiger theme version 2.0 or earlier. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- WordPress Tiger Theme
📦 What is this software?
Tiger by Jocoxdesign
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, take over the WordPress site, install backdoors, and compromise all user data.
Likely Case
Attackers steal user session cookies, redirect visitors to malicious sites, or deface web pages.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking a malicious link).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 2.0
Vendor Advisory: https://patchstack.com/database/wordpress/theme/tiger/vulnerability/wordpress-tiger-theme-2-0-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Update Tiger theme to latest version via WordPress admin panel. 2. If update unavailable, replace with secure alternative theme. 3. Clear browser caches after update.
🔧 Temporary Workarounds
Content Security Policy (CSP)
allImplement CSP headers to restrict script execution sources.
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "default-src 'self'; script-src 'self'";
Input Validation Filter
allAdd WordPress filter to sanitize all theme inputs.
Add to theme functions.php: add_filter('preprocess_comment', 'wp_filter_nohtml_kses');
Add to theme functions.php: add_filter('the_title', 'esc_html');
🧯 If You Can't Patch
- Disable or replace the Tiger theme immediately with a secure alternative.
- Implement web application firewall (WAF) rules to block XSS payloads in requests.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Tiger theme version 2.0 or earlier.Check Version:
wp theme list --field=name,version --format=csv | grep tigerVerify Fix Applied:
Verify theme version is above 2.0 in WordPress admin, then test with XSS payload: <script>alert('test')</script> in theme inputs.📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript in query parameters
- Multiple failed login attempts from unexpected locations after XSS exploitation
Network Indicators:
- Outbound connections to unknown domains from WordPress server
- Unexpected redirects in HTTP responses
SIEM Query:
source="web_server" AND (url="*<script>*" OR url="*javascript:*" OR url="*onerror=*" OR url="*onload=*")