CVE-2024-27476 is an HTML Injection vulnerability found in Leantime version 3.0.6, specifically within the /dashboard/show#/tickets/newTicket endpoint. HTML Injection occurs when an application allows untrusted input to be included in web pages without proper sanitization or encoding, enabling attackers to inject arbitrary HTML code. This can lead to various attacks such as content spoofing, UI redressing, or facilitating social engineering attacks. The vulnerability does not require authentication or privileges but does require user interaction, such as a victim visiting a crafted URL or interacting with malicious content. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N) indicates network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, no confidentiality impact, low integrity impact, and no availability impact. The CWE-94 reference is typically associated with code injection, but here it likely refers to improper input handling leading to injection. No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed promptly. Leantime is an open-source project management tool used by organizations for task and project tracking, so this vulnerability could be leveraged to manipulate ticket data or inject misleading content in the user interface.

The primary impact of this vulnerability is on the integrity of the Leantime application’s user interface and data presentation. An attacker could inject malicious HTML to alter the appearance or behavior of the ticket creation page, potentially misleading users or tricking them into performing unintended actions. While confidentiality and availability are not directly affected, the injected content could be used as a vector for phishing or social engineering attacks, indirectly compromising user credentials or trust. Organizations relying on Leantime for project management may experience reduced trust in their internal tools or face operational disruptions if users are confused or misled by injected content. Since exploitation requires user interaction, the risk is somewhat mitigated but still significant in environments where users frequently interact with ticketing systems. The lack of known exploits reduces immediate risk but does not eliminate the threat, especially as public disclosure may inspire attackers to develop exploits.

Organizations should monitor for updates from the Leantime development team and apply patches as soon as they become available. In the absence of an official patch, administrators can implement input validation and output encoding on the /dashboard/show#/tickets/newTicket endpoint to sanitize user inputs and prevent HTML injection. Employing Content Security Policy (CSP) headers can help mitigate the impact of injected HTML by restricting the execution of unauthorized scripts or content. User education about the risks of interacting with suspicious links or content within the project management tool can reduce the likelihood of successful exploitation. Additionally, restricting access to the ticket creation page to trusted users and enforcing strong authentication can further reduce risk. Regular security assessments and code reviews focusing on input handling in Leantime can help identify and remediate similar vulnerabilities proactively.