CVE-2025-6679
📋 TL;DR
The Bit Form builder plugin for WordPress allows unauthenticated attackers to upload arbitrary files due to missing file type validation. This affects all versions up to 2.20.4 when the PRO version is installed and a form with advanced file upload is published. Successful exploitation could lead to remote code execution.
💻 Affected Systems
- Bit Form 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
Remote code execution leading to complete server compromise, data theft, malware deployment, or website defacement.
Likely Case
Arbitrary file upload leading to webshell installation, backdoor persistence, or data exfiltration.
If Mitigated
File upload attempts blocked or logged with no successful exploitation.
🎯 Exploit Status
Exploitation requires specific plugin configuration but is straightforward once conditions are met.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.20.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Bit Form plugin. 4. Click 'Update Now' if available. 5. If not, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Advanced File Upload Forms
allTemporarily remove or disable any forms using advanced file upload elements.
Web Server File Upload Restrictions
linuxConfigure web server to block uploads of executable file types to WordPress upload directories.
# Apache .htaccess example
<FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps|pl|py|jsp|asp|sh|cgi)">
Order Allow,Deny
Deny from all
</FilesMatch>
🧯 If You Can't Patch
- Disable the Bit Form plugin entirely until patched.
- Implement WAF rules to block suspicious file upload patterns to WordPress endpoints.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Bit Form version. If version is 2.20.4 or earlier and PRO version is active, site is vulnerable.Check Version:
# WordPress CLI
wp plugin list --name=bit-form --field=version
# Or check wp-content/plugins/bit-form/bit-form.php file headerVerify Fix Applied:
Confirm Bit Form plugin version is 2.20.5 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /wp-content/uploads/bit-form/ directory
- POST requests to bit-form file upload endpoints with executable file extensions
- Web server error logs showing blocked upload attempts
Network Indicators:
- HTTP POST requests containing file uploads to bit-form endpoints
- Traffic patterns showing uploads of non-standard file types
SIEM Query:
source="web_server" AND (uri_path="/wp-content/plugins/bit-form/*" OR uri_path="/wp-json/bit-form/*") AND http_method="POST" AND (file_extension="php" OR file_extension="phtml" OR file_extension="jsp" OR file_extension="asp")🔗 References
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3343461%40bit-form%2Ftrunk&old=3336733%40bit-form%2Ftrunk&sfp_email=&sfph_mail=
- https://wordpress.org/plugins/bit-form/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6e2e294f-904b-4674-8baf-d3a9a260d634?source=cve
