CVE-2025-39381
📋 TL;DR
This vulnerability allows attackers to perform Cross-Site Request Forgery (CSRF) attacks that lead to Stored Cross-Site Scripting (XSS) in the KiotViet Sync WordPress plugin. Attackers can trick authenticated administrators into executing malicious actions that inject persistent scripts into the website. All WordPress sites using vulnerable versions of KiotViet Sync are affected.
💻 Affected Systems
- KiotViet Sync 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 malicious JavaScript that steals administrator credentials, redirects users to phishing sites, or takes full control of the WordPress site when administrators view infected pages.
Likely Case
Attackers create fake requests that trick administrators into unknowingly injecting malicious scripts into the site, which then execute in visitors' browsers to steal session cookies or perform unauthorized actions.
If Mitigated
With proper CSRF tokens and input validation, the attack chain would be broken at the initial CSRF stage, preventing the XSS payload from being stored.
🎯 Exploit Status
Exploitation requires social engineering to trick an authenticated administrator, but the technical execution is straightforward once the administrator is targeted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find KiotViet Sync and click 'Update Now'. 4. Verify version is 1.8.5 or higher.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the KiotViet Sync plugin until patched
wp plugin deactivate kiotvietsync
Implement CSRF Protection
allAdd custom CSRF tokens to all plugin forms if you cannot update immediately
🧯 If You Can't Patch
- Restrict plugin access to trusted administrators only and implement strict access controls
- Deploy a Web Application Firewall (WAF) with CSRF and XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for KiotViet Sync versionCheck Version:
wp plugin get kiotvietsync --field=versionVerify Fix Applied:
Verify KiotViet Sync version is 1.8.5 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to KiotViet Sync endpoints
- Administrator actions from unexpected IP addresses or user agents
Network Indicators:
- CSRF attack patterns with missing or predictable tokens
- JavaScript injection in plugin-related requests
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" OR uri_path CONTAINS "kiotviet") AND (http_method="POST" AND (referer IS NULL OR referer NOT CONTAINS domain))