CVE-2021-29106 There is a reflected Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server version 10.8.1 and below.

Medium 4.7 Published 10 Jul 2021 Updated 10 Apr 2025

Remote attackers can execute arbitrary JavaScript in user browsers via crafted links in Esri ArcGIS Server.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-29106?

CVE-2021-29106 is a medium-severity cross-site scripting vulnerability in Esri Arcgis Server, published on 10 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A reflected Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server version 10.8.1 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.

Weakness: CWE-79

Which versions are affected by CVE-2021-29106?

It affects 1 product.

Products include Esri Arcgis Server.

How do I fix CVE-2021-29106?

No fix has been published for CVE-2021-29106 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-29106 being exploited?

There is no known exploitation of CVE-2021-29106 in the wild and no public exploit code.

All Esri Arcgis Server vulnerabilities

Sources

Also known as GHSA-hxj4-xxrj-q2gx.