CVE-2024-34243 in Konga
Summary
by MITRE • 05/14/2024
Konga v0.14.9 is vulnerable to Cross Site Scripting (XSS) via the username parameter.
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Analysis
by VulDB Data Team • 06/13/2025
The vulnerability identified as CVE-2024-34243 affects Konga version 0.14.9 and represents a critical cross site scripting flaw that can be exploited through the username parameter. This vulnerability falls under the CWE-79 category of Cross Site Scripting, which is one of the most prevalent and dangerous web application security flaws. Konga is a web-based administration interface for Apache Kafka that allows users to manage topics, consumers, and other Kafka resources through a graphical user interface. The XSS vulnerability exists because the application fails to properly sanitize or encode user input when processing the username parameter, allowing malicious actors to inject arbitrary script code that executes in the context of other users' browsers.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious username containing script code that gets reflected back to other users who view the affected page. This reflected XSS attack vector typically involves embedding javascript payloads within the username parameter during user registration or profile update operations. When other users navigate to pages that display this username, the malicious script executes in their browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability impacts the integrity of the web application's user interface and can compromise the security of the entire Kafka management system.
The operational impact of this vulnerability extends beyond simple script execution as it can enable attackers to gain unauthorized access to Kafka resources through session manipulation and credential theft. Attackers can leverage the XSS flaw to steal authentication cookies, perform actions on behalf of legitimate users, or redirect victims to phishing sites designed to capture credentials. This vulnerability particularly affects organizations using Konga for Kafka administration, as it undermines the trust model of the web interface and can lead to unauthorized access to critical data streaming infrastructure. The reflected nature of the attack means that the vulnerability can be exploited through social engineering techniques where attackers convince users to click on malicious links or visit compromised pages.
Organizations should immediately implement input validation and output encoding measures to address this vulnerability. The recommended mitigations include implementing proper sanitization of all user inputs, particularly the username parameter, through the use of context-appropriate encoding mechanisms such as HTML entity encoding for web contexts. Additionally, implementing Content Security Policy headers can provide an additional layer of protection against script execution. The vulnerability also highlights the importance of regular security assessments and input validation across all user-facing parameters in web applications. Organizations should consider implementing web application firewalls and monitoring for suspicious input patterns to detect potential exploitation attempts. This vulnerability aligns with ATT&CK technique T1566.001 for credential access through phishing and T1071.001 for application layer protocol usage, demonstrating how XSS vulnerabilities can serve as initial access vectors for more comprehensive attacks against enterprise infrastructure. Regular security updates and patch management processes should be strengthened to prevent similar issues in future versions of the Konga application and similar web interfaces.