CVE-2025-23712
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the Kapost WordPress plugin allows attackers to inject malicious scripts that become stored XSS. This affects WordPress sites using Kapost plugin versions up to 2.2.9. Attackers can trick authenticated administrators into executing actions that inject persistent malicious scripts.
💻 Affected Systems
- Kapost 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 inject persistent malicious scripts that steal administrator credentials, hijack sessions, deface websites, or redirect users to malicious sites whenever vulnerable pages are loaded.
Likely Case
Attackers create fake forms or links that trick administrators into unknowingly injecting malicious JavaScript into the site, leading to session hijacking or credential theft for site visitors.
If Mitigated
With proper CSRF tokens and input validation, the vulnerability would be prevented as unauthorized requests would be rejected before reaching the XSS injection point.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated administrators. The CSRF leads to stored XSS, making the attack persistent once successful.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 2.2.9
Vendor Advisory: https://patchstack.com/database/wordpress/plugin/kapost-byline/vulnerability/wordpress-kapost-plugin-2-2-9-csrf-to-stored-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Kapost plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and remove plugin, then install latest version from WordPress repository.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all form submissions and state-changing actions in the plugin
Input Validation and Output Encoding
allImplement strict input validation and output encoding for all user-controllable data
🧯 If You Can't Patch
- Deactivate and remove the Kapost plugin immediately
- Implement web application firewall (WAF) rules to block CSRF attempts and XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins, find Kapost plugin and verify version is 2.2.9 or earlierCheck Version:
wp plugin list --name=kapost --field=version (if WP-CLI installed)Verify Fix Applied:
After updating, verify Kapost plugin version is higher than 2.2.9 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Kapost plugin endpoints without referrer headers
- Multiple failed CSRF token validations
- JavaScript injection attempts in Kapost-related form submissions
Network Indicators:
- Cross-origin requests to Kapost admin endpoints
- Malicious JavaScript payloads in HTTP POST parameters
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" OR uri_path CONTAINS "kapost") AND http_method="POST" AND (referrer="" OR referrer CONTAINS "malicious-domain")