PatchSiren cyber security CVE debrief
CVE-2026-23697 Vtiger CVE debrief
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. This vulnerability has a high impact on affected deployments, as it allows attackers to execute arbitrary code on the server. System administrators and security teams should prioritize patching to prevent potential remote code execution attacks.
- Vendor
- Vtiger
- Product
- Vtiger CRM
- CVSS
- HIGH 8.7
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-07
- Original CVE updated
- 2026-07-07
- Advisory published
- 2026-07-07
- Advisory updated
- 2026-07-07
Who should care
System administrators and security teams responsible for Vtiger CRM deployments should prioritize patching to prevent potential remote code execution attacks. Additionally, security teams should review and correct .htaccess configurations for Apache 2.4 deployments to prevent exploitation of this vulnerability. Users with low privileges who can access the Documents module are also at risk and should be aware of the vulnerability.
Technical summary
The vulnerability exists in Vtiger CRM versions before 8.4.0, where an authenticated user with low privileges can upload a .phar file containing PHP code through the Documents module. The uploaded file is stored with its original .phar extension under a web-accessible directory. A misconfigured .htaccess file using Apache 2.2 syntax is ignored on Apache 2.4 deployments, allowing unauthenticated HTTP requests to execute the uploaded PHP payload directly. This vulnerability has a CVSS score of 8.7 and is considered high severity.
Defensive priority
High priority should be given to patching Vtiger CRM instances to prevent exploitation of this vulnerability.
Recommended defensive actions
- Apply the latest patch (8.4.0 or later) to Vtiger CRM installations.
- Restrict access to the Documents module for low-privileged users.
- Implement additional monitoring for suspicious file uploads and HTTP requests.
- Review and correct .htaccess configurations for Apache 2.4 deployments.
- Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
- Review compensating controls for exposed systems while remediation is scheduled and verified.
- Track exceptions, retest remediated assets, and close the item only after evidence is documented.
Evidence notes
The CVE record was published on 2026-07-07T17:16:35.977Z and was last modified on 2026-07-07T19:16:51.263Z. The NVD entry is currently in the 'Received' status. This information is based on the supplied source corpus and may not reflect the current status of the vulnerability. Defenders should verify the current status and scope of the vulnerability with the vendor or through other trusted sources.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-07T17:16:35.977Z and has not been modified since then. The NVD entry is currently Received.