External risk intelligence

vTiger CRM Tag Reflected Cross-Site Scripting Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2024-44777

vTiger CRM is a web-based application designed to be accessed by users, often serving as a business portal. Such applications are commonly deployed as internet-facing web services to facilitate remote access for employees and customers, placing the interface and its parameters in a position where they are frequently reachable from the public internet.

Cross-site Scripting

Vtiger Crm

7.4.0

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A reflected cross-site scripting vulnerability exists in vTiger CRM, allowing potential execution of arbitrary code within a user's browser by injecting a crafted payload into the tag parameter.

Code execution via user browser interaction.
Affects customer relationship management systems.
Confirm relevance and exposure of CRM usage.

Attack Path

How an attacker could exploit the issue

An attacker could target users of vTiger CRM 7.4.0 by sending them a malicious link. If the user clicks this link, a crafted payload within the tag parameter of the index page could be executed in their browser, potentially leading to further actions within the user's session.

No authentication required.
Triggered via crafted link.
Arbitrary code execution in browser.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to execute arbitrary code within a user's web browser when they interact with the index page of vTiger CRM. This is possible by tricking a user into clicking a crafted link containing a malicious payload in the tag parameter, thereby potentially impacting the user's session and data accessible through their browser.

User browser context.
Malicious link via tag parameter.
Arbitrary code execution in browser.

Operational Fix

Recommended remediation, mitigation, and detection steps

Owners of vTiger CRM instances should take the lead in addressing this vulnerability. The first step is to confirm the presence and reachability of vTiger CRM, identify the specific business-critical applications and accountable owners, and then prioritize remediation based on exposure and business impact.

Confirm vTiger CRM presence and reachability.
Verify business criticality and ownership.
Plan remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is vTiger CRM?

vTiger CRM is a web-based customer relationship management platform used by organizations to track sales, support interactions, and marketing data. Because it manages business-critical information, it is typically hosted as a central web portal that employees and customers access through a browser to perform their daily tasks.

What does CVE-2024-44777 mean?

This identifier refers to a Reflected Cross-Site Scripting (XSS) vulnerability, classified as CWE-79. In simple terms, the application fails to properly clean input provided in the 'tag' parameter of the index page. This allows an attacker to inject malicious scripts into a web page; if a user views that page, the browser will execute the injected code as if it were a legitimate part of the site.

How is this vTiger CRM vulnerability triggered?

The flaw is triggered when a user clicks a specially crafted link containing a malicious payload in the tag parameter. It does not execute automatically simply by the server hosting the software. If a user does not interact with the specific malicious URL, the code execution does not occur.

Is my instance affected by this?

Halo Surface Signal indicates that vTiger CRM is frequently deployed as an internet-facing web service to support remote access. If your instance is reachable from the public internet, it falls into the category of systems that are more easily targeted by external actors using these malicious links.

What should I do to secure my system?

Start by identifying all deployed instances of vTiger CRM 7.4.0 in your environment and confirm who owns or manages them. Once you have a complete inventory, verify the business criticality of those specific instances. Prioritize these systems for patching or configuration updates to mitigate the risk of browser-based attacks against your users.

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.