CVE-2024-54687 identifies a Cross Site Scripting (XSS) vulnerability in Vtiger CRM version 6.1 and earlier, specifically within the Documents module's uploadAndSaveFile function in the CRMEntity.php file. This vulnerability arises due to insufficient sanitization of user-supplied input when uploading and saving files, allowing an attacker to inject malicious JavaScript code. When a victim user interacts with the crafted malicious content, the injected script executes in their browser context, potentially enabling session hijacking, theft of sensitive information, or unauthorized actions within the CRM interface. The vulnerability does not require authentication (PR:N) but does require user interaction (UI:R), such as clicking a malicious link or opening a crafted document. The CVSS 3.1 base score is 6.1, reflecting a medium severity level, with attack vector being network (AV:N), low attack complexity (AC:L), and scope changed (S:C), indicating that the vulnerability can affect components beyond the initially vulnerable module. No public exploits have been reported yet, but the presence of this vulnerability in a widely used CRM platform poses a risk to organizations relying on Vtiger CRM for customer relationship management. The CWE-79 classification confirms this is a classic XSS issue, which is a common web application security flaw. The lack of available patches at the time of publication means organizations must implement interim mitigations to reduce risk.

The primary impact of CVE-2024-54687 is on the confidentiality and integrity of data within affected Vtiger CRM installations. Successful exploitation can allow attackers to execute arbitrary scripts in the context of authenticated users, potentially leading to session hijacking, unauthorized data access, or manipulation of CRM data. This can result in leakage of sensitive customer information, unauthorized changes to records, or further pivoting within the organization's network. Although availability is not directly impacted, the compromise of CRM data integrity and confidentiality can undermine business operations, damage reputation, and lead to regulatory compliance issues, especially in sectors handling sensitive customer data. Organizations with large user bases or those integrating Vtiger CRM with other critical systems face elevated risks. The absence of known exploits reduces immediate threat but does not eliminate the risk of future attacks, especially as proof-of-concept code may emerge. The medium severity suggests a moderate but significant risk that should be addressed promptly to avoid exploitation.

To mitigate CVE-2024-54687, organizations should first verify if they are running Vtiger CRM version 6.1 or earlier and plan for an upgrade to a patched version once available. In the absence of official patches, implement strict input validation and sanitization on all user-supplied data in the Documents module, particularly in the uploadAndSaveFile function. Employ robust output encoding to neutralize any injected scripts before rendering content in the browser. Restrict allowed file types and enforce content-type validation during file uploads to prevent malicious payloads. Additionally, implement Content Security Policy (CSP) headers to limit the execution of unauthorized scripts. Educate users about the risks of clicking untrusted links or opening suspicious documents within the CRM environment. Monitor logs for unusual activity related to document uploads or script execution. Consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block XSS attack patterns targeting the vulnerable module. Finally, maintain regular backups of CRM data to enable recovery in case of compromise.