In JetBrains TeamCity before 2024.12.2, several DOM-based XSS were possible on the Code Inspection Report tab. This vulnerability allows attackers to execute arbitrary scripts in the context of the user’s session, potentially leading to unauthorized actions or exposure of sensitive information. The CVSS score of 4.6 indicates a medium severity level, underlining the importance of addressing this issue before it can be exploited.
Risk to organizations includes potential data theft or manipulation, as attackers may leverage these XSS vulnerabilities to perform actions on behalf of users. Given the nature of XSS, user interaction is required to trigger the exploitation, but the impact could be significant if successful.
Organizations should prioritize patching immediately to prevent unauthorized access and exploitation of these vulnerabilities. Regular updates and security assessments are crucial to maintain the integrity of the systems.
The vulnerability was published on February 11, 2025, and is currently not marked as actively exploited or having known exploits. However, organizations should remain vigilant and ensure they are using the latest versions of affected products.
Vulnerability Details
The vulnerability is classified under CWE-79, which refers to improper neutralization of input during web page generation (also known as Cross-site Scripting). The primary metrics indicate that the attack vector is network-based, with low complexity and a requirement for user interaction.
JetBrains TeamCity is affected, and the versions prior to 2024.12.2 are vulnerable. The published date for this vulnerability was February 11, 2025, with the last modification noted on May 16, 2025.
Technical Analysis
The root cause of this vulnerability stems from insufficient input validation and output encoding, which allows attackers to inject malicious scripts into the Code Inspection Report tab. The attack vector is network-based, indicating that the exploitation can occur remotely.
The attack complexity is low, meaning that an attacker does not require advanced skills to exploit this vulnerability. It requires low privileges, as even users with minimal access can potentially trigger the XSS. User interaction is necessary, as the malicious script must be executed in the context of the user's session.
The confidentiality and integrity impacts are both rated as low, indicating that while sensitive information may be exposed, the overall system availability remains unaffected.
Risk & Impact Analysis
Real-world deployment risk for this vulnerability is notable due to the potential for data theft and unauthorized actions triggered through XSS attacks. Organizations utilizing JetBrains TeamCity must recognize that the impact may extend beyond individual users, affecting the entire system's integrity if exploited.
The urgency for organizations to address this vulnerability is underscored by its medium CVSS score. While it is not classified as critically urgent, it should be included in the priority patch cycle to mitigate associated risks effectively.
The blast radius of this vulnerability could affect all users of JetBrains TeamCity prior to version 2024.12.2, potentially allowing mass exploitation if left unaddressed.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of JetBrains TeamCity prior to 2024.12.2 are affected by this vulnerability. Organizations should ensure they are on the latest version to mitigate potential risks.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to JetBrains TeamCity version 2024.12.2 or later. If immediate patching is not feasible, organizations should implement input sanitization and validation mechanisms to minimize the risk of XSS attacks.
Regular security assessments and monitoring should also be conducted to identify and mitigate similar vulnerabilities in the future. Organizations can benefit from conducting penetration testing to validate security measures and the effectiveness of patches applied.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor web application logs for unusual activity, particularly on the Code Inspection Report tab.
Indicators of compromise may include unexpected script executions or unauthorized changes to report data. Implementing web application firewalls (WAFs) can also help in filtering out malicious requests.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-26493 lies in its representation of the ongoing challenges in web security, particularly regarding XSS vulnerabilities in widely used applications like JetBrains TeamCity. Security teams must recognize the importance of proactive measures and continuous monitoring to mitigate such vulnerabilities.
This incident highlights the need for a comprehensive approach to application security, including regular updates, code reviews, and user education on safe practices. Security teams should also consider adopting a vulnerability management program to ensure that all potential risks are identified and mitigated.
The patterns observed from this vulnerability suggest that organizations should remain vigilant against similar threats, reinforcing security measures as part of their infrastructure. Finally, leveraging resources for penetration testing methodology can help in identifying and addressing such vulnerabilities before they are exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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