What it is
CVE-2025-27505 is an unauthenticated GeoServer Missing Authorization on REST API Index. GeoServer is an open source server that allows users to share and edit geospatial data. It is possible to bypass the default REST...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2025-27505
GeoServer Missing Authorization on REST API Index
geoserver / geoserver · >= 2.26.0, < 2.26.3
- Severity
- CVSS 5.3 · Medium
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 1.0%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
geoserver / geoserver >= 2.26.0, < 2.26.3.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
GeoServer is an open source server that allows users to share and edit geospatial data
GeoServer is an open source server that allows users to share and edit geospatial data. It is possible to bypass the default REST API security and access the index page. The REST API security handles rest and its subpaths but not rest with an extension (e.g., rest.html).
The REST API index can disclose whether certain extensions are installed. This vulnerability is fixed in 2.26.3 and 2.25.6. As a workaround, in ${GEOSERVER_DATA_DIR}/security/config.xml, change the paths for the rest filter to /rest.*,/rest/** and change the paths for the gwc filter to /gwc/rest.*,/gwc/rest/** and restart GeoServer.
Vendor
Product
Affected
Status
geoserver
geoserver
>= 2.26.0, < 2.26.3
Affected
geoserver
geoserver
Before 2.25.6
Affected
- Published
- 10 Jun 2025
- Exploitation Reported
- 20 Nov 2025
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
nuclei_scanner
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-27505
- https://github.com/geoserver/geoserver/security/advisories/GHSA-h86g-x8mm-78m5 github.com · CVE Record https://github.com/geoserver/geoserver/security/advisories/GHSA-h86g-...
- https://github.com/geoserver/geoserver/pull/8170 github.com · CVE Record https://github.com/geoserver/geoserver/pull/8170
- https://osgeo-org.atlassian.net/browse/GEOS-11664 osgeo-org.atlassian.net · CVE Record https://osgeo-org.atlassian.net/browse/GEOS-11664
- https://osgeo-org.atlassian.net/browse/GEOS-11776 osgeo-org.atlassian.net · CVE Record https://osgeo-org.atlassian.net/browse/GEOS-11776
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
The Shadowserver
Independent exploitation attestation added to the KEV Intelligence record.
Proof of concept available
Nuclei Templates
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2025-11-20 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nuclei template detected 01 Jun 2026.
View Nuclei template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-27505.yaml | 01 Jun 2026 |
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
5.3
Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
1.0%
Weaknesses
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
GeoServer - Missing Authorization on REST API Index
nuclei · Created Unknown
Timeline
From disclosure to observed exploitation
-
Public PoC available
Public proof-of-concept code published
-
Nuclei template available
Scanner coverage available
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2025-27505
Free JSON includes basic KEV fields{
"cve_id": "CVE-2025-27505",
"confidence": "High",
"cvss_score": 5.3,
"cvss_estimated": false,
"epss_score": 0.01022,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
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