What is CVE-2025-27511?

CVE-2025-27511 is a high-severity vulnerability in Geoserver Org.geoserver.extension:gs-Db2, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2026-06-18.

How severe is CVE-2025-27511?

High severity. CVSS v3 base score is 7.2 out of 10.

Deserialization in Geoserver Org.geoserver.extension:gs-Db2

CVE-2025-27511

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.

Published 2026-06-18 · last modified 2026-06-24.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Geoserver Org.geoserver.extension:gs-Db2 — versions < 2.27.0
Osgeo Geoserver

Weakness classification (CWE)

References

github.com/geoserver/geoserver/security/advisories/GHSA-g628-r368-6vh7 (Vendor Advisory)
github.com/geoserver/geoserver/releases/tag/2.27.0 (Product, Release Notes)
nvd.nist.gov/vuln/detail/cve-2023-27867 (Not Applicable)
osgeo-org.atlassian.net/browse/GEOT-7725 (Issue Tracking)

Frequently asked questions

What is CVE-2025-27511?: CVE-2025-27511 is a high-severity vulnerability in Geoserver Org.geoserver.extension:gs-Db2, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2026-06-18.
How severe is CVE-2025-27511?: High severity. CVSS v3 base score is 7.2 out of 10.