CVE-2021-29108

There is an privilege escalation vulnerability in organization-specific logins in Esri Portal for ArcGIS versions 10.9 and below.

Published Oct 1, 2021 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
There is an privilege escalation vulnerability in organization-specific logins in Esri Portal for ArcGIS versions 10.9 and below that may allow a remote, authenticated attacker who is able to intercept and modify a SAML assertion to impersonate another account (XML Signature Wrapping Attack). In addition patching, Esri also strongly recommends as best practice for SAML assertions to be signed and encrypted.

Remediation

Vendor Solution

https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/Portal-for-ArcGIS-Securit... https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/Portal-for-ArcGIS-Security-2021-Update-1-Patch


Vendor Workaround

Always encrypt and sign SAML assertions.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-15749 There is an privilege escalation vulnerability in organization-specific logins in Esri Portal for ArcGIS versions 10.9 and below that may allow a remote, authenticated attacker who is able to intercept and modify a SAML assertion to impersonate another account (XML Signature Wrapping Attack). In addition patching, Esri also strongly recommends as best practice for SAML assertions to be signed and encrypted.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Esri
Published
Updated
Apr 10, 2025, 2:59 PM
Reserved
Mar 23, 2021, 12:00 AM
Status
Modified
Published
Oct 1, 2021, 3:15 PM
Modified
Jun 17, 2026, 3:47 AM