CVE-2025-57923
📋 TL;DR
The UK Address Postcode Validation WordPress plugin exposes API keys in sent data, allowing unauthorized third parties to steal and misuse them. This affects all WordPress sites using the plugin versions up to 3.9.2 with default configuration. Attackers can deplete API credits or use the keys for unauthorized address validation services.
💻 Affected Systems
- UK Address Postcode Validation 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 steal API keys, exhaust all API credits causing service disruption, and potentially use the keys for other malicious activities across any domain.
Likely Case
Unauthorized third parties discover and use exposed API keys, depleting credits and incurring unexpected costs for the plugin owner.
If Mitigated
With proper URL restrictions on API keys, impact is limited to potential key exposure without unauthorized usage.
🎯 Exploit Status
Exploitation requires intercepting or accessing data sent by the plugin. No authentication bypass needed once data is intercepted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.9.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'UK Address Postcode Validation'. 4. Click 'Update Now' if update available. 5. If no update appears, manually download version 3.9.3+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Restrict API Key URLs
allConfigure API keys with specific allowed URLs to prevent cross-domain misuse.
Navigate to plugin settings > API configuration > Add specific domain URLs to 'Allowed URLs' field
🧯 If You Can't Patch
- Disable the plugin temporarily until patched.
- Implement network monitoring for unusual API key usage patterns.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel for plugin version. If version is 3.9.2 or earlier, you are vulnerable.Check Version:
wp plugin list --name='uk-address-postcode-validation' --field=version (WP-CLI) or check WordPress admin plugins pageVerify Fix Applied:
Confirm plugin version is 3.9.3 or later in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual API usage patterns from unexpected domains
- Rapid depletion of API credits
Network Indicators:
- API requests to validation service from unauthorized domains
- Unexpected traffic patterns to the plugin endpoints
SIEM Query:
source="wordpress_logs" plugin="uk-address-postcode-validation" (api_key OR sensitive_data)