CVE-2023-25836 Explained : Impact and Mitigation

This CVE-2023-25836 vulnerability involves a Cross-site Scripting (XSS) issue in Esri Portal Sites, affecting versions 10.8.1 through 10.9. An attacker with remote authenticated access could exploit this vulnerability to execute arbitrary JavaScript code by tricking a victim into clicking on a specially crafted link. The attack requires minimal privileges to execute.

Understanding CVE-2023-25836

This section delves into the details of the CVE-2023-25836 vulnerability, shedding light on its impact and technical aspects.

What is CVE-2023-25836?

The CVE-2023-25836 vulnerability refers to a Cross-site Scripting (XSS) flaw present in Esri Portal Sites versions 10.8.1 through 10.9. This security issue allows a remote attacker with authenticated access to inject and execute malicious JavaScript code in a victim's browser via a carefully crafted link. The attack can occur with low-privileged user interaction.

The Impact of CVE-2023-25836

The impact of CVE-2023-25836 is classified as medium severity, with a CVSS v3.1 base score of 5.4. This vulnerability could lead to the execution of arbitrary JavaScript code, potentially compromising the confidentiality and integrity of the affected system. However, the availability impact is assessed as none.

Technical Details of CVE-2023-25836

In this section, we will explore the technical aspects of the CVE-2023-25836 vulnerability, including its description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in question involves a Cross-site Scripting (XSS) issue in Esri Portal Sites versions 10.8.1 through 10.9. An attacker with remote authenticated access can exploit this flaw to execute arbitrary JavaScript code in a victim's browser by luring them to click on a maliciously crafted link.

Affected Systems and Versions

Esri Portal Sites versions 10.8.1 through 10.9 are impacted by this XSS vulnerability. Specifically, the vulnerability affects users of Portal for ArcGIS Enterprise Sites Security Patch version 10.8.1.

Exploitation Mechanism

To exploit CVE-2023-25836, an attacker must have remote, authenticated access to the system. By creating a specially crafted link and tricking a privileged user into clicking on it, the attacker can execute malicious JavaScript code in the victim's browser.

Mitigation and Prevention

To address CVE-2023-25836 and mitigate its risks, it is crucial to take immediate steps and implement long-term security practices to enhance the resilience of the affected systems.

Immediate Steps to Take

Organizations using Esri Portal Sites versions 10.8.1 through 10.9 should apply the necessary security patches provided by Esri to address the Cross-site Scripting vulnerability.
Users are advised to exercise caution while clicking on links and to avoid interacting with potentially malicious content to minimize the risk of exploitation.

Long-Term Security Practices

Regular security assessments and audits can help identify and remediate vulnerabilities in the system before they are exploited.
Security training and awareness programs for users can help prevent successful social engineering attacks that may lead to exploitation of vulnerabilities like XSS.

Patching and Updates

Esri has released a security patch for Portal for ArcGIS Enterprise Sites version 10.8.1 to address the XSS vulnerability. It is essential for organizations to promptly apply this patch and stay updated with future security advisories to protect their systems from potential attacks.