Description
There is a missing authentication vulnerability in Esri Portal for ArcGIS versions 12.0 and prior that may allow a remote, unauthenticated attacker to access a specific resource (not user content) that should only be accessible by authenticated users. Users working with ArcGIS Enterprise 11.1, 11.3, 11.5, or 12.0 are encouraged to patch. All users are advised to upgrade to the latest long-term support release.
Affected products
esri: portal for arcgis
References1
- www.esri.com/arcgis-blog/products/arcgis-enterprise/administrat… Vendor Advisory
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 0% percentile: 42 · as of 9 November 2026
- CWE
- CWE-306
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.