CVE-2021-30203 Scanner

Dzzoffice is a widely used open-source online office platform designed to facilitate document management, collaborative work, and productivity enhancements primarily in organizational settings. Employed by businesses and institutions for efficient data storage and sharing, it serves as a robust alternative to many mainstream office solutions. The software provides an integrated suite for managing emails, schedules, and project-related documents with intuitive interfaces. Owing to its international adaptability and customization options, Dzzoffice has seen significant adoption in regions supporting UTF-8 characters. Its user-friendly design extends capabilities for enhanced communication within application ecosystems. Continuous enhancements ensure Dzzoffice maintains relevance in an evolving digital workspace landscape.

Cross-Site Scripting (XSS) is a prevalent and impactful vulnerability that allows attackers to inject malicious scripts into web pages viewed by users. This type of attack could compromise a website's security and user data integrity by executing scripts in the context of a user's session. XSS poses significant risks to web applications because it could allow attackers uncontrolled access to sensitive information, or lead to unwanted actions performed on behalf of the users. It infiltrates web content with potentially destructive code, leveraging social engineering or direct exploitation without user awareness. Understanding and mitigating XSS is crucial for upholding the security of web-based applications. Sites must encapsulate proper data validation and escaping strategies to prevent such attacks effectively.

The discovered XSS vulnerability in Dzzoffice occurs by manipulating the 'zero' parameter within a specific HTTP POST request. Specifically, remote attackers can inject arbitrary web script or HTML, potentially enabling unauthorized script execution in a user's browser. The exploited endpoint is located within the system and orgtree module, which is susceptible to this script injection. A malicious payload, such as '', could be utilized to hijack user sessions or retrieve sensitive data. Technical details indicate that this vulnerability presents itself when providing unchecked data input, which is then improperly rendered via an HTML context. As a result, executing JavaScript commands becomes feasible for attackers, exploiting the trust between the user and the hosted content.

Exploiting this XSS vulnerability could have several damaging impacts on users and systems relying on Dzzoffice. Participants in a vulnerable session could see their personal session identifiers stolen, leading to unauthorized access and data breaches. Malicious individuals might execute fraudulent transactions or alter critical data, undermining business operations and reputation. The integrity of communications handled through the platform could diminish, leading users to gradually lose trust as they fall victim to manipulated disclosures or phishing scams. In the worst scenarios, a compromised user environment could become persevered by malware distribution. Proactively addressing XSS issues emphasizes the importance of applying secure coding practices and rigorous input validation techniques within applications.

REFERENCES

• https://github.com/zyx0814/dzzoffice/issues/183
• https://nvd.nist.gov/vuln/detail/CVE-2021-30203