Vtiger CRM up to 8.4.0 Admin Module Import Feature manifest.xml unrestricted upload

Summaryinfo

A vulnerability labeled as problematic has been found in Vtiger CRM up to 8.4.0. Affected by this issue is some unknown functionality of the file manifest.xml of the component Admin Module Import Feature. Such manipulation leads to unrestricted upload. This vulnerability is uniquely identified as CVE-2026-23698. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Vtiger CRM up to 8.4.0. Affected by this issue is an unknown part of the file manifest.xml of the component Admin Module Import Feature. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Vtiger CRM through 8.4.0 contains an authenticated remote code execution vulnerability in the admin module import feature that allows administrator-level attackers to upload arbitrary PHP files by submitting a crafted zip archive through the ModuleManager import function, which extracts contents directly into the modules/ directory under the web root without validating file types beyond the manifest.xml descriptor. Attackers can place executable PHP files in the modules/ directory that become directly accessible via HTTP, bypassing Vtiger's authentication and authorization layer entirely since Apache resolves the path and invokes the PHP interpreter before the application routing layer is involved, resulting in a persistent web shell independent of the originating session.

The advisory is shared for download at jivasecurity.com. This vulnerability is handled as CVE-2026-23698 since 01/14/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/07/2026). The MITRE ATT&CK project declares the attack technique as T1608.002.

By approaching the search of inurl:manifest.xml it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Customer Relationship Management System

Vendor

• Vtiger

Name

• CRM

Version

• 8.0
• 8.1
• 8.2
• 8.3
• 8.4.0

License

• open-source

Website

• Vendor: https://www.vtiger.com/

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Once again VulDB remains the best source for vulnerability data.

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