CVE-2025-12107 is a vulnerability identified in WSO2 Identity Server version 5.11.0.130, stemming from the use of a vulnerable third-party Velocity template engine. The root cause is improper neutralization of special elements used in the template engine (CWE-1336), which allows a malicious actor with administrative privileges to inject arbitrary template syntax into server-side templates. This injection can lead to the execution of arbitrary template code on the server, potentially enabling remote code execution (RCE). The vulnerability impacts the confidentiality, integrity, and availability of the affected system by allowing unauthorized data access, data manipulation, and disruption of services. Exploitation requires administrative privileges but does not require user interaction, increasing the risk in environments where admin accounts may be compromised or misused. The vulnerability has a CVSS v3.1 base score of 8.4, reflecting high severity with attack vector as adjacent network (AV:A), low attack complexity (AC:L), high privileges required (PR:H), no user interaction (UI:N), and scope changed (S:C). Although no known exploits are currently reported in the wild, the potential impact and ease of exploitation by an insider or attacker with admin access make this a critical issue for organizations relying on WSO2 Identity Server for identity and access management.

The impact of CVE-2025-12107 is significant for organizations using WSO2 Identity Server 5.11.0.130. Successful exploitation can lead to remote code execution, allowing attackers to run arbitrary code on the server, which can compromise the entire identity management infrastructure. This can result in unauthorized access to sensitive user data, manipulation of authentication and authorization processes, and potential lateral movement within the network. The integrity of identity data and authentication workflows can be compromised, leading to trust violations and potential data breaches. Availability may also be affected if attackers disrupt identity services or execute denial-of-service conditions. Given the central role of identity servers in enterprise security, this vulnerability poses a high risk to organizations' security posture, compliance requirements, and operational continuity.

To mitigate CVE-2025-12107, organizations should: 1) Immediately upgrade WSO2 Identity Server to a patched version once available from the vendor. 2) If a patch is not yet available, restrict administrative access strictly to trusted personnel and enforce strong multi-factor authentication (MFA) to reduce the risk of credential compromise. 3) Audit and monitor administrative activities and template configurations for suspicious changes or injections. 4) Implement network segmentation to limit access to the identity server from only necessary systems and networks. 5) Employ runtime application self-protection (RASP) or web application firewalls (WAF) with custom rules to detect and block malicious template syntax injections. 6) Regularly review and harden template usage policies and sanitize any user-supplied input that may be processed by templates. 7) Conduct security awareness training for administrators about the risks of privilege misuse and the importance of secure template management. These targeted actions go beyond generic advice by focusing on controlling admin privileges, monitoring template integrity, and applying layered defenses until a vendor patch is deployed.