CVE-2021-31908 : Security Advisory and Response
Learn about CVE-2021-31908, a critical stored XSS vulnerability in JetBrains TeamCity before 2020.2.3 that could allow attackers to execute malicious scripts and compromise systems.
In JetBrains TeamCity before version 2020.2.3, a stored XSS vulnerability allowed attackers to execute malicious scripts on multiple pages.
Understanding CVE-2021-31908
This CVE describes a security issue in JetBrains TeamCity that could lead to stored cross-site scripting attacks.
What is CVE-2021-31908?
The vulnerability in JetBrains TeamCity before version 2020.2.3 enabled the injection of malicious scripts into various pages, posing a risk of sensitive data exposure and unauthorized actions.
The Impact of CVE-2021-31908
Exploitation of this vulnerability could allow threat actors to execute arbitrary code within the context of the user's session, compromising confidentiality, integrity, and availability of the affected system.
Technical Details of CVE-2021-31908
This section provides more insight into the specifics of the CVE.
Vulnerability Description
The stored XSS flaw in JetBrains TeamCity could be abused by attackers to insert and execute malicious scripts, potentially leading to data theft or system compromise.
Affected Systems and Versions
All JetBrains TeamCity instances running versions earlier than 2020.2.3 are susceptible to this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by injecting crafted scripts into vulnerable pages, taking advantage of insufficient input validation.
Mitigation and Prevention
To safeguard your systems from CVE-2021-31908, follow these recommended security measures.
Immediate Steps to Take
- Update JetBrains TeamCity to version 2020.2.3 or later to patch the vulnerability.
- Regularly monitor and review system logs for any suspicious activities.
Long-Term Security Practices
- Conduct regular security assessments and penetration testing to uncover vulnerabilities.
- Educate employees on secure coding practices and the risks associated with XSS attacks.
Patching and Updates
Stay informed about security bulletins and updates released by JetBrains to address vulnerabilities in their software.