Home

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.

PUBLISHED Reserved 2026-01-14 | Published 2026-07-07 | Updated 2026-07-14 | Assigner VulnCheck




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Unrestricted Upload of File with Dangerous Type

Product status

Default status
affected

Any version
affected

8.4.0 (semver)
unaffected

Credits

Jiva (JivaSecurity) finder

References

jivasecurity.com/...ps/vtiger-rce-phar-upload-cve-2026-23697 (Researcher Disclosure) technical-description exploit

www.vtiger.com/ (Project Homepage) product

www.vulncheck.com/...ed-file-upload-rce-via-documents-module third-party-advisory

cve.org (CVE-2026-23697)

nvd.nist.gov (CVE-2026-23697)

Download JSON