CVE-2025-31575
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into WordPress websites using the Flag Icons plugin. When executed, these scripts can steal user sessions, deface websites, or redirect visitors to malicious sites. All WordPress sites running Flag Icons version 2.2 or earlier are affected.
💻 Affected Systems
- Flag Icons (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, take full control of the WordPress site, install backdoors, or compromise visitor data through session hijacking.
Likely Case
Attackers inject malicious JavaScript that steals user cookies/sessions, redirects users to phishing sites, or displays unwanted content/ads.
If Mitigated
With proper input validation and output encoding, the XSS payloads would be neutralized before execution, preventing any malicious impact.
🎯 Exploit Status
XSS vulnerabilities are commonly weaponized in automated attacks. The stored nature means injected scripts persist across sessions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Flag Icons' plugin. 4. Click 'Update Now' if available. 5. If no update appears, manually download version 2.3+ from WordPress repository and replace the plugin files.
🔧 Temporary Workarounds
Disable Flag Icons Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate flag-icons
Implement WAF Rules
allAdd XSS protection rules to web application firewall
# Add rule to block script tags in POST/GET parameters
# Example ModSecurity: SecRule ARGS "<script" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Remove the Flag Icons plugin entirely and use alternative flag display solutions
- Implement strict Content Security Policy (CSP) headers to prevent script execution from unauthorized sources
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Flag Icons version 2.2 or earlierCheck Version:
wp plugin get flag-icons --field=versionVerify Fix Applied:
Verify Flag Icons plugin version is 2.3 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests containing script tags to plugin endpoints
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Inbound requests with JavaScript payloads to /wp-content/plugins/flag-icons/ paths
SIEM Query:
source="web_server" AND (uri="*flag-icons*" AND (body="*<script*" OR body="*javascript:*"))