CVE-2026-25315
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the hCaptcha for WP WordPress plugin that allows attackers to bypass access controls. It affects all WordPress sites using hCaptcha for WP plugin versions up to and including 4.22.0. Attackers could potentially modify plugin settings or access restricted functionality.
💻 Affected Systems
- hCaptcha for WP (hcaptcha-for-forms-and-more)
⚠️ 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
Complete compromise of WordPress site through privilege escalation, allowing attackers to modify critical settings, inject malicious code, or take over administrative functions.
Likely Case
Unauthorized modification of hCaptcha settings, disabling security protections, or accessing plugin functionality intended only for administrators.
If Mitigated
Limited impact with proper network segmentation and additional authentication layers preventing access to vulnerable endpoints.
🎯 Exploit Status
Exploitation requires some level of access but detailed technical information is publicly available on Patchstack.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.23.0 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'hCaptcha for WP' and click 'Update Now'. 4. Verify update to version 4.23.0 or higher.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched
wp plugin deactivate hcaptcha-for-forms-and-more
Access Restriction via .htaccess
linuxRestrict access to plugin admin endpoints
# Add to .htaccess in WordPress root:
<FilesMatch "hcaptcha\.php">
Order Deny,Allow
Deny from all
</FilesMatch>
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block unauthorized access to hCaptcha admin endpoints
- Enable additional authentication requirements for WordPress admin area and monitor for suspicious access attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → hCaptcha for WP version. If version is 4.22.0 or lower, you are vulnerable.Check Version:
wp plugin get hcaptcha-for-forms-and-more --field=versionVerify Fix Applied:
After updating, verify plugin version shows 4.23.0 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unauthorized POST requests to /wp-admin/admin-ajax.php with hcaptcha action parameters
- Multiple failed authentication attempts followed by successful hCaptcha configuration changes
Network Indicators:
- Unusual traffic patterns to hCaptcha admin endpoints from unauthorized IP addresses
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" AND parameters CONTAINS "action=hcaptcha") AND user_role!="administrator"