CVE-2021-29105: There is a stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server Services Directory version 10.8.1 and below.

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-11 · updated 2026-06-17
Weakness: CWE-79

Description

A stored Cross Site Scripting (XSS) vulnerability in Esri ArcGIS Server Services Directory version 10.8.1 and below may allow a remote authenticated attacker to pass and store malicious strings in the ArcGIS Services Directory.

Affected products

Esri ArcGIS Server: before 10.9.0 — fixed in 10.9.0

How to fix

Upgrade to a fixed version: Esri ArcGIS Server 10.9.0. Check the vendor advisory for mitigations.

References

https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/arcgis-server-security-2021-update-1-patch/
https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/arcgis-server-security-2021-update-1-patch/

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