EUVD-2026-64161
GHSA-fvj8-q86x-cgm8
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Network-accessible reflected XSS with no attacker privileges; scope change reflects cross-component token access potential; user click required limits automation; no availability impact.
Primary rating from Vendor (Esri).
CVSS VectorVendor: Esri
Lifecycle Timeline
1DescriptionCVE.org
There is a reflected cross site scripting vulnerability in Esri Portal for ArcGIS versions 11.5 and prior which may allow a remote, unauthenticated attacker to create a crafted link which when clicked could potentially execute arbitrary JavaScript code in the victim’s browser. Users working with ArcGIS Enterprise 11.1, 11.3, and 11.5 are encouraged to patch. All users are advised to upgrade to the latest long-term support release. Users working with ArcGIS Web App Builder developer edition are advised to migrate to ArcGIS Experience Builder, as ArcGIS Web App Builder developer edition is unsupported when this CVE is assigned.
AnalysisAI
Reflected cross-site scripting in Esri Portal for ArcGIS versions 11.5 and prior allows a remote, unauthenticated attacker to craft a malicious URL that, when clicked by a victim, executes arbitrary JavaScript in the victim's browser. The CVSS Scope:Changed metric indicates that injected scripts may affect components beyond the vulnerable Portal itself, such as session tokens shared across an ArcGIS Enterprise deployment. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is mandatory - the victim must click a specially crafted link (confirmed by CVSS UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 6.1 Medium score is driven by a network attack vector with low complexity and no attacker privileges required, partially offset by the mandatory user-interaction (UI:R) requirement and limited confidentiality and integrity impacts (C:L/I:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Esri's primary recommendation is to upgrade to the latest long-term support release of ArcGIS Enterprise, as detailed in the August 2026 ArcGIS Security Bulletin (https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/august-2026-arcgis-security-bulletin). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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