CVE-2021-29108
8.8 · HIGHOverview
CVE-2021-29108 is a high-severity vulnerability affecting esri portal_for_arcgis. It was published on October 1, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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
Check the references section for vendor advisories and patches from esri. Update portal_for_arcgis to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| esri | portal_for_arcgis | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-29108?
CVE-2021-29108 is a high-severity vulnerability affecting esri portal_for_arcgis. It was published on October 1, 2021 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2021-29108?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-29108?
Check the references section for vendor advisories and patches from esri. Update portal_for_arcgis to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-29108?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-29108 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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