CVE-2026-69234

Received Received - Intake

Reflected XSS in Esri Portal for ArcGIS

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: Environmental Systems Research Institute, Inc.

Description

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-21

Last Modified

2026-08-21

Generated

2026-08-22

AI Q&A

2026-08-22

EPSS Evaluated

N/A

NVD

CVE-2026-69234

Affected Vendors & Products

Vendor	Product	Version / Range
esri	portal_for_arcgis	to 11.5 (exc)
esri	arcgis_enterprise	From 11.1 (inc) to 11.5 (inc)
esri	arcgis_web_app_builder_developer_edition	*
esri	arcgis_experience_builder	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This is a reflected cross-site scripting (XSS) vulnerability in Esri Portal for ArcGIS versions 11.5 and earlier. It allows a remote, unauthenticated attacker to craft a malicious link that, when clicked by a victim, could execute arbitrary JavaScript code in the victim's browser.

Detection Guidance

Detecting this reflected XSS vulnerability requires checking for vulnerable versions of Esri Portal for ArcGIS. Verify if your system is running versions 11.5 or prior. Check web server logs for suspicious URLs containing JavaScript payloads or unusual query parameters. Inspect browser console logs for unexpected script executions when accessing the portal.

Impact Analysis

An attacker could trick you into clicking a malicious link, potentially stealing session cookies, redirecting you to phishing sites, or performing actions on your behalf within the application. This could lead to unauthorized access or data theft.

Mitigation Strategies

Immediately upgrade Esri Portal for ArcGIS to the latest version, especially if running 11.5 or prior. Users on ArcGIS Enterprise 11.1, 11.3, or 11.5 should patch immediately. Migrate from ArcGIS Web App Builder developer edition to ArcGIS Experience Builder. Apply input validation and output encoding to prevent XSS attacks.

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