CVE-2021-29110 : What You Need to Know

A stored cross-site scripting (XSS) vulnerability in Esri Portal for ArcGIS could enable a remote unauthenticated attacker to inject and store malicious scripts within the home application.

Understanding CVE-2021-29110

This CVE record details a critical security issue in Esri Portal for ArcGIS that could lead to the execution of unauthorized scripts.

What is CVE-2021-29110?

The CVE-2021-29110 vulnerability involves a stored cross-site scripting (XSS) flaw in Esri Portal for ArcGIS, allowing attackers to insert and store harmful code on the application.

The Impact of CVE-2021-29110

The impact of this vulnerability is rated as medium severity, with a CVSS base score of 5.4. It could compromise the confidentiality and integrity of the affected systems, requiring user interaction for exploitation.

Technical Details of CVE-2021-29110

This section elaborates on the specifics of the vulnerability, including the description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The XSS flaw in Esri Portal for ArcGIS permits remote unauthenticated attackers to pass and retain malicious strings in the home application, posing a significant security risk.

Affected Systems and Versions

The impacted platform is x64, and the vulnerable product is Esri's Portal for ArcGIS with all versions up to and including 10.9.

Exploitation Mechanism

The vulnerability's low attack complexity and network-based attack vector make it accessible to threat actors with low privileges, mandating user interaction for successful exploitation.

Mitigation and Prevention

To address CVE-2021-29110 effectively, immediate steps, long-term security practices, and the importance of patching and updates are essential.

Immediate Steps to Take

Implementing security measures such as input validation, sanitization of user input, and ensuring proper access controls can help mitigate the risk posed by this XSS vulnerability.

Long-Term Security Practices

Regular security training for developers, continuous monitoring of web applications, and adhering to secure coding practices can enhance the overall security posture against XSS attacks.

Patching and Updates

Esri provides security patches and updates to address vulnerabilities like CVE-2021-29110 in Portal for ArcGIS. Applying these patches promptly is crucial to safeguard systems from potential exploits.