CVE-2021-23925 : What You Need to Know

An issue was discovered in Devolutions Server before 2020.3, leading to a cross-site scripting (XSS) vulnerability in entries of type Document.

Understanding CVE-2021-23925

This CVE relates to a security issue affecting Devolutions Server before version 2020.3, allowing for potential cross-site scripting (XSS) attacks.

What is CVE-2021-23925?

CVE-2021-23925 is a cross-site scripting (XSS) vulnerability found in entries of type Document in Devolutions Server versions prior to 2020.3. This security flaw could be exploited by attackers to execute malicious scripts in the context of end-users interacting with the vulnerable application.

The Impact of CVE-2021-23925

The impact of this vulnerability could lead to unauthorized access to sensitive information, compromise of user accounts, and potential manipulation of data stored in Devolutions Server.

Technical Details of CVE-2021-23925

This section delves into the specific technical details of the vulnerability.

Vulnerability Description

The vulnerability stems from insufficient input validation in entries of type Document in Devolutions Server, enabling attackers to inject and execute malicious scripts.

Affected Systems and Versions

Devolutions Server versions before 2020.3 are affected by CVE-2021-23925. Users of these versions are urged to update to a secure release immediately.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting and injecting malicious scripts into the affected entries of type Document, potentially leading to the execution of unauthorized actions.

Mitigation and Prevention

Protecting systems from CVE-2021-23925 requires both immediate actions and long-term security practices.

Immediate Steps to Take

Users should upgrade Devolutions Server to version 2020.3 or newer to mitigate the vulnerability.
Employ web application firewalls (WAFs) to filter and block malicious traffic that may exploit XSS vulnerabilities.

Long-Term Security Practices

Regularly scan and monitor web applications for vulnerabilities, including XSS issues.
Educate developers and users about secure coding practices and the risks associated with XSS attacks.

Patching and Updates

Developers must stay informed about security updates and patches released by Devolutions to address vulnerabilities like CVE-2021-23925.