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TI-2021-09990 Aliases CVE-2021-29103GHSA-5x8q-j8xv-5p5f

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

Priority LOW 29CWE-79Published · Updated

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 (XXS) vulnerability in 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 0.00744 54th percentileScored 2026-11-07
Fix Fixed ArcGIS Server (Esri): 10.9

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

VendorProductAffected versionsFixed inStatusSource
EsriArcGIS ServerAll to before 10.910.9Patch availableCNA
  • ArcGIS Server VendorEsri Affected All to before 10.9 Fixed in 10.9 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:esri:arcgis_server:*:*:*:*:*:*:x64:*before 10.9.0VulnerableEsri
  • 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

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-29103
  2. 2026-10-03 Alias added: GHSA-5x8q-j8xv-5p5f

References

Advisory 1

  • 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