What’s Vulnerable › Vulnerabilities

CVE-2026-23697: Vtiger CRM < 8.4.0 Authenticated File Upload RCE via Documents Module

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-07 · updated 2026-10-25
• Weakness: CWE-434

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.

Affected products

• Vtiger CRM: through 8.3.0

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-via-documents-module

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