CVE-2023-1716 in Bitrix24
Summary
by MITRE • 11/01/2023
Cross-site scripting (XSS) vulnerability in Invoice Edit Page in Bitrix24 22.0.300 allows attackers to execute arbitrary JavaScript code in the victim's browser, and possibly execute arbitrary PHP code on the server if the victim has administrator privilege.
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Analysis
by VulDB Data Team • 11/29/2023
The vulnerability identified as CVE-2023-1716 represents a critical cross-site scripting flaw within the Invoice Edit Page functionality of Bitrix24 version 22.0.300. This security weakness stems from inadequate input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before rendering it within the web application's interface. The flaw exists in the invoice editing module where user inputs are directly incorporated into dynamic HTML content without appropriate sanitization measures, creating an avenue for malicious actors to inject persistent JavaScript payloads.
The technical implementation of this vulnerability allows attackers to exploit the lack of proper input sanitization by injecting malicious scripts through invoice-related fields that are subsequently rendered in the browser. When an authenticated user with administrative privileges views the compromised invoice page, the injected JavaScript executes within their browser context, potentially enabling session hijacking, credential theft, or redirection to malicious sites. The severity of this vulnerability escalates significantly when considering that administrators possess elevated privileges within the system, making them prime targets for exploitation.
The operational impact of CVE-2023-1716 extends beyond simple client-side scripting attacks, as the vulnerability creates potential for server-side code execution when exploited against administrator accounts. This dual nature of the vulnerability means that successful exploitation could lead to complete system compromise, data exfiltration, or unauthorized access to sensitive business information. The attack surface is particularly concerning given that Bitrix24 is a widely-used business management platform that handles sensitive financial and operational data, making it an attractive target for cybercriminals seeking persistent access to enterprise environments.
Organizations utilizing Bitrix24 version 22.0.300 should immediately implement mitigations including input validation, output encoding, and proper content security policy enforcement. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and follows ATT&CK technique T1566 related to phishing campaigns that could leverage such vulnerabilities. Additionally, implementing proper access controls, regular security updates, and user input sanitization practices would significantly reduce the risk of exploitation. Security teams should also conduct comprehensive penetration testing and monitor for anomalous user behavior that might indicate successful exploitation attempts.