Authenticated File Upload Vulnerability in Vtiger CRM by Vtiger
CVE-2026-23697

8.7HIGH

Key Information:

Vendor

Vtiger

Status
Vtiger Crm
Vendor
CVE Published:
7 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-23697?

Vtiger CRM versions prior to 8.4.0 are subject to an authenticated file upload vulnerability that allows low-privileged users to perform remote code execution. This is achieved by uploading a .phar file containing malicious PHP code through the Documents module, circumventing the configured denylist in config.inc.php, which fails to restrict the .phar extension. The uploaded file retains its .phar extension and is stored in a web-accessible directory, where misconfigured .htaccess files in Apache 2.4 deployments do not restrict access, allowing unauthorized HTTP requests to execute the PHP payload.

Affected Version(s)

Vtiger CRM 0 <= 8.3.0

Vtiger CRM 0 <= 8.3.0

Vtiger CRM 8.4.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-23697 - Proof of Concept

References

https://jivasecurity.com/writeups/vtiger-rce-phar-upload-...
technical-descriptionexploit
https://www.vtiger.com/
product
https://www.vulncheck.com/advisories/vtiger-crm-authentic...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jiva (JivaSecurity)
.