CVE-2025-30145 is a high-severity vulnerability affecting GeoServer, an open-source server widely used for sharing and editing geospatial data. The vulnerability arises from the execution of malicious Jiffle scripts within GeoServer, either as rendering transformations in Web Map Service (WMS) dynamic styles or as Web Processing Service (WPS) processes. Specifically, these scripts can be crafted to enter an infinite loop due to a loop with an unreachable exit condition (CWE-835). This infinite loop causes the GeoServer process to hang indefinitely, resulting in a denial of service (DoS) condition. The vulnerability affects GeoServer versions 2.25.7 and earlier, as well as versions from 2.26.0 up to but not including 2.26.3. The issue has been addressed in versions 2.27.0, 2.26.3, and 2.25.7. The CVSS v3.1 base score is 7.5, reflecting a high severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to availability (no confidentiality or integrity impact). No known exploits are currently reported in the wild. Mitigation can be achieved by disabling WMS dynamic styling and the Jiffle process, which are the vectors for executing these scripts. This vulnerability is particularly critical for organizations relying on GeoServer for geospatial data services, as it can be exploited remotely without authentication to disrupt service availability.

For European organizations, the impact of this vulnerability can be significant, especially for government agencies, urban planning departments, environmental monitoring organizations, and private companies that rely heavily on geospatial data services provided by GeoServer. A successful exploitation leads to denial of service, potentially disrupting critical geospatial data access and processing workflows. This can affect decision-making processes, emergency response coordination, and public services that depend on real-time or near-real-time geospatial information. The lack of confidentiality or integrity impact limits data breach concerns, but availability disruption can cause operational downtime and loss of trust. Given the remote and unauthenticated nature of the exploit, attackers can easily target exposed GeoServer instances, amplifying the risk. The disruption could also have cascading effects on dependent systems and services that consume GeoServer outputs.

To mitigate this vulnerability, European organizations should promptly upgrade GeoServer installations to versions 2.27.0, 2.26.3, or 2.25.7 where the vulnerability is fixed. If immediate upgrading is not feasible, disabling WMS dynamic styling and the Jiffle process is recommended to prevent execution of malicious scripts. Network-level protections such as firewall rules restricting access to GeoServer management interfaces and WMS/WPS endpoints to trusted IPs can reduce exposure. Monitoring GeoServer logs for unusual or repeated Jiffle script executions can help detect attempted exploitation. Additionally, implementing rate limiting and anomaly detection on GeoServer services may help mitigate denial of service attempts. Organizations should also review and harden access controls and ensure GeoServer instances are not unnecessarily exposed to the public internet. Regular vulnerability scanning and patch management processes should be enforced to promptly identify and remediate such issues.