CVE-2025-9515
📋 TL;DR
The Multi Step Form WordPress plugin allows authenticated administrators to upload arbitrary files due to missing file type validation in the import functionality. This vulnerability could lead to remote code execution on affected WordPress sites. Only WordPress installations with this specific plugin are affected.
💻 Affected Systems
- WordPress Multi Step Form 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
Full server compromise via remote code execution, allowing attackers to install malware, steal data, or use the server for further attacks.
Likely Case
Unauthorized file upload leading to webshell installation and limited server access.
If Mitigated
No impact if proper file upload validation and administrator account security are in place.
🎯 Exploit Status
Exploitation requires administrator credentials but is technically simple once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.7.25
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Multi Step Form' and click 'Update Now'. 4. Verify plugin version is 1.7.26 or higher.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the vulnerable plugin until patching is possible.
wp plugin deactivate multi-step-form
Restrict file uploads
allImplement web application firewall rules to block suspicious file uploads.
🧯 If You Can't Patch
- Remove administrator access from untrusted users and implement multi-factor authentication.
- Implement file integrity monitoring on WordPress upload directories.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Multi Step Form → Version. If version is 1.7.25 or lower, you are vulnerable.Check Version:
wp plugin get multi-step-form --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.7.26 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to WordPress upload directories
- POST requests to /wp-admin/admin-ajax.php with import actions
- Administrator account logins from unusual locations
Network Indicators:
- HTTP POST requests with file uploads to plugin-specific endpoints
- Unusual outbound connections from WordPress server
SIEM Query:
source="wordpress.log" AND ("multi-step-form" OR "import") AND ("upload" OR "file")🔗 References
- https://github.com/mlooft/multi-step-form/commit/590f9ac9d746b2a8aec0c12ba770252e86dc40ed
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3351951%40multi-step-form&new=3351951%40multi-step-form&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/af7dbb61-90b1-4a61-819e-bcef88b12b7f?source=cve
