Vulnerability Description
Vtiger CRM before 8.4.0 contains an authenticated file upload vulnerability that allows low-privileged users to achieve remote code execution by uploading a .phar file containing arbitrary PHP code through the Documents module, bypassing the extension denylist in config.inc.php which omits the .phar extension. The uploaded file is stored with its original .phar extension under the web-accessible storage directory, and a misconfigured .htaccess using Apache 2.2 syntax is silently ignored on Apache 2.4 deployments, allowing unauthenticated HTTP requests to directly execute the uploaded PHP payload.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://jivasecurity.com/writeups/vtiger-rce-phar-upload-cve-2026-23697
- https://www.vtiger.com/
- https://www.vulncheck.com/advisories/vtiger-crm-authenticated-file-upload-rce-vi
FAQ
What is CVE-2026-23697?
CVE-2026-23697 is a vulnerability with a CVSS score of 8.8 (HIGH). Vtiger CRM before 8.4.0 contains an authenticated file upload vulnerability that allows low-privileged users to achieve remote code execution by uploading a .phar file containing arbitrary PHP code th...
How severe is CVE-2026-23697?
CVE-2026-23697 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23697?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.