CVE-2021-43198 : Security Advisory and Response

In JetBrains TeamCity before 2021.1.2, stored XSS is possible.

Understanding CVE-2021-43198

This CVE-2021-43198 involves a stored cross-site scripting (XSS) vulnerability in JetBrains TeamCity.

What is CVE-2021-43198?

CVE-2021-43198 is a security vulnerability in JetBrains TeamCity versions prior to 2021.1.2 that allows for stored XSS attacks.

The Impact of CVE-2021-43198

The presence of this vulnerability could lead to an attacker injecting malicious scripts into the application, potentially impacting users accessing the affected application.

Technical Details of CVE-2021-43198

This section provides technical details about the vulnerability.

Vulnerability Description

In JetBrains TeamCity before version 2021.1.2, there exists a vulnerability that allows for the storage of malicious scripts, enabling cross-site scripting attacks.

Affected Systems and Versions

Affected Systems: JetBrains TeamCity
Affected Versions: Versions before 2021.1.2

Exploitation Mechanism

The vulnerability can be exploited by an attacker injecting crafted scripts into the application, which are then executed in the context of legitimate users.

Mitigation and Prevention

To address CVE-2021-43198, follow these mitigation strategies:

Immediate Steps to Take

Upgrade JetBrains TeamCity to version 2021.1.2 or later.
Regularly monitor and sanitize user inputs to prevent script injection.

Long-Term Security Practices

Implement secure coding practices to mitigate XSS vulnerabilities.
Conduct regular security assessments and audits of the application's codebase.

Patching and Updates

Stay informed about security bulletins and updates from JetBrains.
Apply patches promptly to ensure the latest security fixes are in place.