CVE-2021-31911 Explained : Impact and Mitigation

In JetBrains TeamCity before 2020.2.3, a reflected Cross-Site Scripting (XSS) vulnerability was identified that could be exploited on several pages.

Understanding CVE-2021-31911

This CVE involves a security issue in JetBrains TeamCity that could allow attackers to conduct XSS attacks on various pages.

What is CVE-2021-31911?

CVE-2021-31911 is a reflected XSS vulnerability in JetBrains TeamCity versions before 2020.2.3, enabling malicious actors to execute script code in the context of a user's session.

The Impact of CVE-2021-31911

The impact of this vulnerability is significant as it could lead to unauthorized script execution, potentially compromising the confidentiality and integrity of data stored in TeamCity.

Technical Details of CVE-2021-31911

This section delves into the specific technical aspects of the CVE, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability allows for the injection of malicious scripts that get executed within the user's browsing session, leading to potential data theft or manipulation.

Affected Systems and Versions

JetBrains TeamCity versions prior to 2020.2.3 are affected by this XSS vulnerability, exposing users to the risk of script execution.

Exploitation Mechanism

Attackers could exploit this vulnerability by crafting malicious links or payloads that, when clicked or processed, execute arbitrary script code in the victim's session.

Mitigation and Prevention

To safeguard your systems and data from CVE-2021-31911, immediate actions, and long-term security practices are essential.

Immediate Steps to Take

Users are advised to update JetBrains TeamCity to version 2020.2.3 or newer to mitigate the XSS vulnerability and prevent potential attacks.

Long-Term Security Practices

Regularly monitor and apply security patches and updates to address known vulnerabilities promptly, reducing the risk of exploitation.

Patching and Updates

Stay informed about security advisories and bulletins from JetBrains to stay ahead of potential threats and secure your software environment.