CVE-2021-29109: Esri Portal For Arcgis

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

A reflected XSS vulnerability in Esri Portal for ArcGIS version 10.9 and below may allow a remote attacker able to convince a user to click on a crafted link which could potentially execute arbitrary JavaScript code in the user’s browser.

Affected products

• Esri Portal For Arcgis: up to and including 10.9

Published 2021-10-01. Last modified 2026-06-17.