CVE-2024-35267 is a cross-site scripting (XSS) vulnerability classified under CWE-79, affecting Microsoft Azure DevOps Server 2022, specifically version 20231128.1. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows an attacker to inject malicious scripts into the application interface. An attacker with low-level privileges and authenticated access can exploit this by crafting malicious input that, when rendered, executes arbitrary JavaScript in the context of other users' browsers. This can lead to theft of authentication tokens, session hijacking, or unauthorized actions performed on behalf of the victim user. The CVSS 3.1 score of 7.6 reflects a high severity, with network attack vector, low attack complexity, and requiring privileges but only low-level ones. User interaction is required, meaning the victim must trigger the malicious payload, typically by viewing a crafted page or input. The scope remains unchanged, indicating the vulnerability affects only the vulnerable component without impacting other components. No public exploits have been reported yet, but the presence of this vulnerability in a widely used enterprise DevOps platform raises concerns for organizations relying on Azure DevOps Server for software development lifecycle management. The vulnerability was reserved in May 2024 and published in July 2024, with Microsoft acknowledged as the assigner. No official patches or mitigation links are provided in the data, indicating organizations must monitor for updates and apply them promptly once available.

For European organizations, this vulnerability poses significant risks to the confidentiality and integrity of their software development processes. Azure DevOps Server is commonly used to manage source code, build pipelines, and deployment workflows, often containing sensitive intellectual property and credentials. Exploitation could allow attackers to steal session tokens, manipulate code repositories, or inject malicious code into builds, potentially leading to supply chain compromises. The requirement for authenticated access limits exposure to insider threats or compromised accounts, but the low privilege level needed increases the attack surface. The user interaction requirement means social engineering or phishing could be used to trigger the exploit. Given the critical role of DevOps in digital transformation and infrastructure management, disruption or compromise could lead to operational delays, data breaches, and reputational damage. European organizations in sectors such as finance, manufacturing, and government, which heavily rely on Azure DevOps Server, are particularly vulnerable. The lack of known exploits currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits rapidly after disclosure.

Organizations should immediately audit their Azure DevOps Server 2022 installations to confirm affected versions (specifically 20231128.1). Until an official patch is released, implement strict input validation and sanitization on all user inputs within the DevOps environment to prevent script injection. Employ Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in browsers accessing the server. Limit user privileges rigorously, ensuring users have only the minimum necessary access to reduce the potential impact of compromised accounts. Monitor logs for unusual activities indicative of attempted XSS exploitation, such as unexpected script payloads or anomalous user actions. Educate users about phishing and social engineering risks that could trigger user interaction required for exploitation. Consider isolating the Azure DevOps Server behind additional security layers such as web application firewalls (WAFs) configured to detect and block XSS attempts. Stay alert for Microsoft’s official patches or security advisories and apply updates promptly once available. Finally, review and enhance incident response plans to address potential exploitation scenarios involving this vulnerability.