TI-2021-09993 Aliases CVE-2021-29106 GHSA-hxj4-xxrj-q2gx

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

LOW 28CWE-79Published 2021-07-10 · Updated 2025-04-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00688 52nd percentileScored 2026-11-07

Fix Fixed ArcGIS Server (Esri): 10.9.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Esri	ArcGIS Server	All to before 10.9.0	10.9.0	Patch available	CNA

ArcGIS Server VendorEsri Affected All to before 10.9.0 Fixed in 10.9.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:esri:arcgis_server:::::::x64:*	before 10.9.0	Vulnerable	Esri

cpe:2.3:a:esri:arcgis_server:*:*:*:*:*:*:x64:* Versions before 10.9.0 Vulnerable ·Esri

Remediation

Fix · CNA ArcGIS Server (Esri) Fixed in 10.9.0

Timeline

2026-10-02 Threatist record created from CVE-2021-29106
2026-10-03 Alias added: GHSA-hxj4-xxrj-q2gx

References

Advisory 1

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

TI-2026-08070 Directory Traversal in ArcGIS Server CVSS 3.1CRITICAL 9.8
TI-2025-35724 BUG-000179884 - There is a security vulnerability in ArcGIS Server Feature Services. CVSS 3.1CRITICAL 10.0
TI-2021-10000 SQL injection vulnerability in ArcGIS Server CVSS 3.1CRITICAL 9.8
TI-2021-09989 There is a Server-Side Request Forgery (SSRF) vulnerability in Esri ArcGIS Server Manager version 10.8.1 and below. CVSS 3.1CRITICAL 9.1
TI-2026-08071 Unvalidated File Upload vulnerability in ArcGIS Server. CVSS 3.1CRITICAL 9.8
TI-2020-18172 Esri ArcGIS Server before 10.8 is vulnerable to SSRF in some configurations. CVSS 3.1CRITICAL 9.8

See all 68 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences