CVE-2025-62016
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files to WordPress sites using the Kallyas theme, potentially leading to remote code execution. It affects all WordPress installations with Kallyas theme versions up to and including 4.22.0. Attackers can exploit this without authentication to compromise the entire website.
💻 Affected Systems
- hogash Kallyas WordPress Theme
⚠️ 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 server compromise via webshell upload leading to data theft, ransomware deployment, or use as attack platform
Likely Case
Website defacement, malware distribution, or credential theft through uploaded malicious files
If Mitigated
File upload attempts blocked at WAF level with no successful exploitation
🎯 Exploit Status
Simple HTTP POST request with malicious file upload, no authentication required
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.22.1 or later
Vendor Advisory: https://patchstack.com/database/Wordpress/Theme/kallyas/vulnerability/wordpress-kallyas-theme-4-22-0-arbitrary-file-upload-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Update Kallyas theme to version 4.22.1 or later via WordPress admin panel 2. Verify theme version in Appearance > Themes 3. Clear WordPress cache if applicable
🔧 Temporary Workarounds
Disable Kallyas Theme
allSwitch to default WordPress theme until patch can be applied
WAF File Upload Blocking
allConfigure WAF to block file uploads to Kallyas-specific endpoints
🧯 If You Can't Patch
- Disable file upload functionality via .htaccess or web server configuration
- Implement strict file type validation and store uploaded files outside web root
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Kallyas version <= 4.22.0Check Version:
wp theme list --field=name,version --status=active (WP-CLI)Verify Fix Applied:
Confirm Kallyas theme version is 4.22.1 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- POST requests to /wp-content/themes/kallyas/upload.php with file uploads
- Unexpected .php, .phtml, or executable files in upload directories
Network Indicators:
- HTTP POST with file upload to theme-specific endpoints
- Unusual outbound connections from web server post-upload
SIEM Query:
source="web_server" method="POST" uri_path="/wp-content/themes/kallyas/*" file_upload="true"