Learn about CVE-2021-21800, a critical Cross-site scripting vulnerability in Advantech R-SeeNet 2.4.12, allowing attackers to execute arbitrary JavaScript code.
This article provides detailed information about CVE-2021-21800, a critical Cross-site scripting vulnerability in Advantech R-SeeNet 2.4.12.
Understanding CVE-2021-21800
CVE-2021-21800 is a high-risk vulnerability affecting Advantech R-SeeNet v 2.4.12 (20.10.2020), allowing attackers to execute arbitrary JavaScript code in a victim's browser.
What is CVE-2021-21800?
A Cross-site scripting vulnerability in ssh_form.php script of Advantech R-SeeNet leads to arbitrary code execution when a user accesses a specially crafted URL.
The Impact of CVE-2021-21800
The vulnerability has a CVSS base score of 9.6, making it critical. Attackers can exploit it to compromise confidentiality, integrity, and availability of the targeted system.
Technical Details of CVE-2021-21800
The technical aspects of this vulnerability include:
Vulnerability Description
Cross-site scripting flaw in ssh_form.php script allows attackers to trigger arbitrary JavaScript code execution through a crafted URL.
Affected Systems and Versions
Advantech R-SeeNet 2.4.12 (20.10.2020) is confirmed to be vulnerable to this issue.
Exploitation Mechanism
By enticing a user to click on a malicious URL, an attacker can exploit this vulnerability to execute arbitrary code within the user's browser.
Mitigation and Prevention
To mitigate the risk associated with CVE-2021-21800, follow these steps:
Immediate Steps to Take
Long-Term Security Practices
Patching and Updates
Regularly monitor for security updates from Advantech and apply patches as soon as they are released.