CVE-2025-62368 is a critical vulnerability classified under CWE-502 (Deserialization of Untrusted Data) affecting the taiga-back component of the Taiga open-source project management platform. Versions prior to 6.9.0, including 6.8.3 and earlier, improperly handle deserialization of data received via the Taiga API. Deserialization is the process of converting data from a format suitable for storage or transmission back into an object or data structure. When untrusted data is deserialized without proper validation or sanitization, it can lead to remote code execution (RCE). In this case, an attacker with at least limited privileges (PR:L) and requiring user interaction (UI:R) can craft malicious payloads that, when processed by the vulnerable API, execute arbitrary code on the server. The vulnerability has a CVSS 3.1 base score of 9.1, indicating critical severity with high impact on confidentiality, integrity, and availability. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. Although no known exploits have been reported in the wild, the nature of RCE vulnerabilities in project management platforms poses a significant risk, as attackers could gain control over project data, inject malicious code, or disrupt operations. The fix is available in Taiga version 6.9.0, which addresses the unsafe deserialization flaw. Organizations using affected versions should upgrade immediately and review API security configurations to prevent exploitation.

For European organizations, the impact of CVE-2025-62368 can be severe. Taiga is used for project management, often handling sensitive project data, timelines, and collaboration information. Successful exploitation could lead to full system compromise, allowing attackers to access confidential project details, intellectual property, and user credentials. Integrity of project data could be compromised, leading to misinformation or sabotage of project workflows. Availability could also be affected if attackers deploy ransomware or disrupt the service, causing operational downtime. Given the criticality and the possibility of remote exploitation, organizations in sectors such as software development, engineering, and consulting that rely on Taiga for project tracking are at heightened risk. The vulnerability could also serve as a pivot point for lateral movement within networks, increasing the overall threat landscape. The requirement for limited privileges and user interaction slightly reduces the attack surface but does not eliminate the risk, especially in environments with many users and automated API interactions.

1. Upgrade all Taiga instances to version 6.9.0 or later immediately to apply the official patch addressing the deserialization vulnerability. 2. Restrict API access to trusted users and systems only, employing strong authentication and authorization mechanisms to minimize the risk of malicious payload submission. 3. Implement network segmentation to isolate Taiga servers from critical infrastructure and sensitive data repositories. 4. Monitor API logs and network traffic for unusual deserialization patterns or unexpected payloads that could indicate exploitation attempts. 5. Employ Web Application Firewalls (WAFs) with rules designed to detect and block malicious serialized objects or suspicious API requests. 6. Conduct regular security audits and code reviews focusing on deserialization and input validation practices in custom integrations or plugins related to Taiga. 7. Educate users about the risks of interacting with untrusted content and enforce policies to reduce social engineering vectors that could trigger user interaction requirements.