CVE-2021-35358 : Security Advisory and Response

A stored cross-site scripting (XSS) vulnerability in dotAdmin/#/c/c_Images of dotCMS 21.05.1 allows authenticated attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the 'Title' and 'Filename' parameters.

Understanding CVE-2021-35358

This section will provide an overview of the CVE-2021-35358 vulnerability, its impact, technical details, and mitigation steps.

What is CVE-2021-35358?

CVE-2021-35358 is a stored cross-site scripting (XSS) vulnerability in dotCMS 21.05.1 that enables authenticated attackers to execute arbitrary web scripts or HTML by inserting a malicious payload into specific parameters.

The Impact of CVE-2021-35358

The vulnerability can be exploited by authenticated attackers to inject malicious scripts or HTML code, potentially leading to unauthorized actions, data theft, or compromised user interactions on the affected dotCMS platform.

Technical Details of CVE-2021-35358

This section will delve into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The XSS flaw in dotCMS 21.05.1 allows attackers with authenticated access to input malicious scripts into certain parameters, which are then executed within the platform, posing a significant security risk.

Affected Systems and Versions

The vulnerability affects dotCMS version 21.05.1, leaving instances of this specific version susceptible to XSS attacks when users interact with the 'Title' and 'Filename' parameters.

Exploitation Mechanism

By leveraging the XSS vulnerability in dotCMS 21.05.1, authenticated attackers can embed harmful scripts or HTML code via crafted payloads in the 'Title' and 'Filename' fields, which get executed within the platform upon user interaction.

Mitigation and Prevention

In this section, we outline immediate steps to take, long-term security practices, and the importance of regular patching and updates.

Immediate Steps to Take

To mitigate the risk associated with CVE-2021-35358, organizations should promptly update dotCMS to a patched version, sanitize user inputs, train personnel on secure coding practices, and monitor for any suspicious activities.

Long-Term Security Practices

Establishing a robust cybersecurity training program, implementing input validation mechanisms, conducting periodic security audits, and adopting a proactive security posture are essential for safeguarding against XSS vulnerabilities like CVE-2021-35358.

Patching and Updates

Regularly applying security patches, staying informed about the latest CVE disclosures, maintaining a secure coding environment, and promptly addressing security advisories are critical to reducing the likelihood of successful exploitation of vulnerabilities like CVE-2021-35358.