CVE-2024-26542 is a Cross Site Scripting (XSS) vulnerability identified in Bonitasoft, S.A's BPM platform versions prior to 7.14.8, 7.15.7, 8.0.3, and 9.0.2. The vulnerability arises from insufficient input sanitization of the Groups Display name field, allowing an attacker to inject malicious scripts. When a user views a group with a crafted display name, the injected script executes in the victim's browser context, potentially leading to session hijacking, credential theft, or unauthorized actions within the application. The attack vector is remote network-based, requiring no privileges or authentication but does require user interaction (viewing the malicious group name). The vulnerability affects confidentiality and integrity by enabling theft or manipulation of sensitive data but does not impact system availability. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) reflects low attack complexity, no privileges required, and user interaction needed, with a scope change due to potential cross-origin effects. No public exploit code or active exploitation has been reported to date. The issue was reserved in February 2024 and published later that month, with fixes released in subsequent Bonitasoft versions. This vulnerability is classified under CWE-79, a common web application security weakness.

The primary impact of CVE-2024-26542 is on the confidentiality and integrity of data within affected Bonitasoft BPM environments. Successful exploitation can lead to the execution of arbitrary scripts in users' browsers, enabling attackers to steal session tokens, manipulate displayed data, or perform unauthorized actions on behalf of users. This can result in unauthorized access to sensitive business process information or manipulation of workflows. Although availability is not directly affected, the breach of trust and data integrity can disrupt business operations and lead to compliance violations. Organizations with exposed Bonitasoft instances accessible to untrusted users or the internet are at higher risk. The lack of authentication requirement lowers the barrier to exploitation, increasing potential exposure. However, the need for user interaction (viewing a malicious group name) somewhat limits automated exploitation. The absence of known exploits in the wild suggests limited current impact but does not preclude future attacks. Overall, the vulnerability poses a moderate risk to organizations relying on affected Bonitasoft versions, especially those handling sensitive or regulated data.

To mitigate CVE-2024-26542, organizations should promptly upgrade Bonitasoft to versions 7.14.8, 7.15.7, 8.0.3, or 9.0.2 or later, where the vulnerability has been fixed. If immediate upgrade is not feasible, implement strict input validation and output encoding on the Groups Display name field to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Limit access to the Bonitasoft management interface to trusted users and networks, reducing exposure to untrusted actors. Monitor logs for suspicious activity related to group name changes or unusual user interactions. Educate users about the risks of interacting with untrusted content within the application. Regularly review and update web application firewall (WAF) rules to detect and block XSS payloads targeting Bonitasoft. Conduct security assessments and penetration tests focusing on web interface input fields to identify similar vulnerabilities proactively. Maintain an incident response plan to address potential exploitation attempts swiftly.