CVE-2023-1715 : What You Need to Know

This CVE-2023-1715 relates to a stored Cross-Site Scripting (XSS) vulnerability in Bitrix24 that allows attackers to bypass XSS sanitization via placing HTML tags at the beginning of the payload.

Understanding CVE-2023-1715

This section provides an overview of the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2023-1715?

The CVE-2023-1715 vulnerability involves a logic error in Bitrix24 version 22.0.300, specifically in the process of checking for potential XSS payloads using mb_strpos(). Attackers can exploit this flaw to evade XSS sanitization by inserting HTML tags at the start of the payload.

The Impact of CVE-2023-1715

The impact of this vulnerability is classified as "Critical" with a CVSS v3.1 base score of 9.0. The attack complexity is low, but the confidentiality, integrity, and availability impacts are high. Successful exploitation requires low privileges and user interaction.

Technical Details of CVE-2023-1715

Understanding the vulnerability, affected systems, and exploitation mechanism is crucial for implementing effective security measures.

Vulnerability Description

The vulnerability originates from an improper neutralization of input during web page generation, specifically leading to cross-site scripting (XSS) issues in Bitrix24.

Affected Systems and Versions

The affected product is Bitrix24, with version 22.0.300 identified as vulnerable to this stored XSS vulnerability. Specifically, the issue occurs in the file: bitrix/components/bitrix/crm.invoice.edit/component.php.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating input data containing HTML tags at the beginning, bypassing the XSS sanitization process in Bitrix24 version 22.0.300.

Mitigation and Prevention

To address CVE-2023-1715, it is essential to implement immediate steps and long-term security practices to mitigate risks and enhance system resilience.

Immediate Steps to Take

Update Bitrix24 to a patched version that addresses the XSS vulnerability.
Implement strict input validation and output encoding to prevent XSS attacks.
Educate users and developers on secure coding practices to mitigate such vulnerabilities.

Long-Term Security Practices

Conduct regular security assessments and vulnerability scans.
Follow secure coding guidelines and practices to prevent XSS vulnerabilities.
Stay informed about security advisories and updates from software vendors.

Patching and Updates

Ensure timely installation of security patches and updates released by Bitrix24 to address known vulnerabilities and enhance system security against potential threats.