CVE-2025-27511 GeoServer DB2 DataStore Extension has a JNDI Vulnerability via Store Connection

What is CVE-2025-27511?

CVE-2025-27511 is a high-severity unsafe deserialization vulnerability in org.geoserver.extension:gs-db2, published on 18 Jun 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

GeoServer is an open source server that allows users to share and edit geospatial data. Prior to version 2.27.0 of the GeoServer DB2 DataStore Extension, an administrator can perform a JNDI attack through specially crafted DB2 jdbc url leading to to Remote Code Execution (RCE). Version 2.27.0 fixes the issue.

Weakness: CWE-74, CWE-502

Which versions are affected by CVE-2025-27511?

2 open source packages ship an affected version, including org.geoserver.extension:gs-db2. It affects 1 product.

Products include Osgeo Geoserver.

How do I fix CVE-2025-27511?

Upgrade org.geoserver.extension:gs-db2 to 2.27.0 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2025-27511 being exploited?

There is no known exploitation of CVE-2025-27511 in the wild and no public exploit code.

Other vulnerabilities in org.geoserver.extension:gs-db2

• CVE-2023-25157 Unfiltered SQL Injection Vulnerabilities in Geoserver Critical 9.8
• CVE-2024-34711 GeoServer has improper ENTITY_RESOLUTION_ALLOWLIST URI validation in XML Processing (SSRF) Critical 9.3
• CVE-2023-41339 Unsecured WMS dynamic styling sld=<url> parameter affords blind unauthenticated SSRF in GeoServer High 8.6
• CVE-2023-43795 WPS Server Side Request Forgery in GeoServer High 8.6
• CVE-2024-29198 GeoServer Vulnerable to Unauthenticated SSRF via TestWfsPost High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-g628-r368-6vh7.