CVE-2025-5679 is a medium-severity deserialization vulnerability affecting Shenzhen Dashi Tongzhou Information Technology's AgileBPM product versions 2.0 through 2.5.0. The vulnerability resides in the parseStrByFreeMarker function within the SysToolsController.java source file. Specifically, the flaw arises from unsafe handling of the 'str' argument, which is deserialized without proper validation or sanitization. This improper deserialization can be triggered remotely without authentication or user interaction, allowing an attacker to craft malicious input that the application will deserialize, potentially leading to arbitrary code execution or other malicious outcomes. The vulnerability has a CVSS 4.0 base score of 5.3, reflecting a medium severity level, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The impact on confidentiality, integrity, and availability is rated low individually but combined could lead to significant compromise depending on the payload. Although no public exploits are currently known in the wild, the vulnerability has been publicly disclosed, increasing the risk of exploitation. AgileBPM is a business process management platform used to automate and optimize enterprise workflows, making this vulnerability particularly concerning as it could allow attackers to disrupt critical business processes or gain unauthorized access to sensitive operational data.

For European organizations using AgileBPM, this vulnerability poses a risk of unauthorized remote code execution or manipulation of business process workflows. Exploitation could lead to disruption of critical enterprise operations, data leakage, or unauthorized modification of process logic, impacting business continuity and compliance with data protection regulations such as GDPR. Given AgileBPM's role in managing workflows, an attacker could potentially interfere with financial processes, HR systems, or supply chain management, causing operational and reputational damage. The medium CVSS score suggests that while exploitation is feasible, the impact may be limited by the need for specific conditions or partial mitigations in place. However, the lack of authentication and user interaction requirements makes it easier for attackers to attempt exploitation at scale, increasing the threat surface for European enterprises relying on this software.

Organizations should immediately identify and inventory all instances of AgileBPM versions 2.0 through 2.5.0 in their environment. Since no official patches are currently linked, it is critical to implement compensating controls such as network segmentation to restrict access to AgileBPM management interfaces, especially from untrusted networks. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious deserialization payloads targeting the parseStrByFreeMarker function. Monitor logs for anomalous input patterns or unexpected deserialization attempts. If possible, disable or restrict the vulnerable endpoint until a vendor patch is released. Engage with Shenzhen Dashi Tongzhou Information Technology for updates and apply patches promptly once available. Additionally, conduct code reviews and penetration testing focused on deserialization vulnerabilities to identify and remediate similar issues proactively. Educate development teams on secure deserialization practices to prevent recurrence.