CVE-2024-22877 is a Cross Site Scripting (XSS) vulnerability affecting StrangeBee TheHive versions 5.2.0 through 5.2.8. The vulnerability resides in the case reporting functionality of TheHive, a popular open-source security incident response platform. Specifically, the issue allows an attacker to inject malicious JavaScript code into report templates or their variables. When a user opens the generated HTML report within the application, the injected script executes in the context of TheHive application. This type of vulnerability is classified under CWE-79, indicating improper neutralization of input leading to script injection. The CVSS v3.1 base score is 5.4 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), user interaction (UI:R), scope changed (S:C), and impacts on confidentiality and integrity but not availability (C:L/I:L/A:N). The vulnerability requires an attacker to have some level of privileges within the application to insert malicious code, and a user must open the affected HTML report for exploitation to occur. There are no known exploits in the wild as of the published date, and no official patches or mitigations have been linked yet. The vulnerability could allow an attacker to execute arbitrary scripts in the victim’s browser session, potentially leading to session hijacking, data theft, or further compromise within the incident response environment.

For European organizations using TheHive for security incident management, this vulnerability poses a risk to the confidentiality and integrity of sensitive incident data. Since TheHive is used to manage and analyze security incidents, exploitation could allow attackers to steal sensitive information about ongoing investigations, manipulate case data, or escalate privileges within the platform. This could undermine incident response efforts and lead to broader security breaches. The requirement for some level of privileges to inject malicious code limits the attack surface to insiders or compromised accounts, but the impact remains significant in environments where TheHive is heavily relied upon. Additionally, the cross-site scripting could be used as a pivot point to attack other integrated systems or users accessing the reports. Given the collaborative nature of incident response in many European organizations, including government agencies and critical infrastructure operators, the confidentiality breach could have regulatory and operational consequences under GDPR and other data protection frameworks.

1. Restrict access to TheHive application strictly to trusted users and enforce strong authentication and authorization controls to minimize the risk of privilege abuse. 2. Implement strict input validation and sanitization on all user-supplied data, especially within report templates and variables, to prevent injection of malicious scripts. 3. Until an official patch is released, consider disabling or limiting the use of HTML report generation or viewing within TheHive to reduce exposure. 4. Monitor logs and user activities for unusual behavior indicative of attempted exploitation or privilege misuse. 5. Educate users to be cautious when opening HTML reports and to report any suspicious content. 6. Follow TheHive project communications closely for updates and apply patches promptly once available. 7. Employ Content Security Policy (CSP) headers in the web application to restrict execution of unauthorized scripts as a defense-in-depth measure. 8. Conduct regular security assessments and code reviews of custom templates or integrations that might increase the attack surface.