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How the CVE Works
CVE-2025-45753 is a critical vulnerability in Vtiger CRM Open Source Edition v8.3.0 that allows authenticated attackers with admin privileges to execute arbitrary PHP code via the Module Import feature. The exploit occurs when a malicious ZIP file containing a crafted PHP script is uploaded through the import functionality. Due to insufficient file validation, the system extracts and executes the embedded script, leading to remote code execution (RCE). Attackers can leverage this to gain full control over the CRM instance, manipulate data, or escalate privileges.
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Platform: Vtiger CRM
Version: 8.3.0
Vulnerability: RCE
Severity: Critical
Date: 06/10/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Exploitation:
1. Attacker logs in as admin.
- Prepares a ZIP file with a malicious
payload.php.
3. Uploads via Module Import.
4. System extracts and executes the script.
Protection:
1. Disable ZIP imports temporarily.
2. Apply input sanitization.
3. Patch upon release.
Analytics:
- Attack Vector: Network (Admin Required)
- Complexity: Low
- Privilege Escalation: Possible
Commands:
Check for vulnerable version grep "version" /var/www/vtiger/version.php Mitigation (Apache) chmod -R 750 /var/www/vtiger/modules/Import
PHP Exploit (PoC):
<?php // Malicious ZIP payload system($_GET['cmd']); ?>
Detection:
-- Audit logs for suspicious imports SELECT FROM vtiger_import_history WHERE filetype = 'zip';
Patch Advisory:
- Vendor update expected mid-July.
- Monitor [Vtiger Security Bulletin].
Workaround:
Block ZIP uploads (Nginx)
location ~ .zip$ { deny all; }
Impact:
- Data theft
- System compromise
- Lateral movement
References:
- CVE-2025-45753 (MITRE)
- Vtiger Issue 4582 (GitHub)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
