CVE-2021-26799 : Exploit Details and Defense Strategies

Omeka Classic <=2.7 is impacted by a Cross Site Scripting (XSS) vulnerability in the admin/files/edit functionality. This vulnerability allows remote attackers to inject arbitrary web scripts or HTML, posing a security risk to affected systems.

Understanding CVE-2021-26799

This section explores the details of the CVE-2021-26799 vulnerability, including its impact and technical aspects.

What is CVE-2021-26799?

The CVE-2021-26799 is a Cross Site Scripting (XSS) vulnerability affecting Omeka Classic <=2.7, enabling malicious actors to insert unauthorized web scripts or HTML code via the admin/files/edit feature.

The Impact of CVE-2021-26799

This vulnerability could be exploited by remote attackers to execute malicious scripts, steal sensitive information, or perform various actions within the context of the affected user's session, compromising the security and integrity of the system.

Technical Details of CVE-2021-26799

Dig deeper into the technical aspects of CVE-2021-26799 to understand its vulnerability description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The vulnerability in the admin/files/edit function of Omeka Classic <=2.7 permits attackers to inject harmful web scripts or HTML code, potentially leading to unauthorized data access or system manipulation.

Affected Systems and Versions

All versions of Omeka Classic up to 2.7 are impacted by this XSS vulnerability, making systems with these versions susceptible to exploitation by threat actors.

Exploitation Mechanism

By leveraging the admin/files/edit feature, remote attackers can inject malicious web scripts or HTML content, bypassing security measures and gaining unauthorized access to sensitive data or system functionality.

Mitigation and Prevention

Learn about the immediate steps to mitigate the risks posed by CVE-2021-26799, as well as long-term security practices and the importance of applying relevant patches and updates.

Immediate Steps to Take

System administrators are advised to restrict access to the affected feature, implement input validation mechanisms, and monitor for any suspicious activities that might indicate exploitation of the XSS vulnerability.

Long-Term Security Practices

Incorporating secure coding practices, conducting regular security audits, fostering security awareness among users, and staying informed about emerging threats are vital for enhancing the overall security posture of the system and preventing similar vulnerabilities.

Patching and Updates

Omeka Classic users should promptly apply the latest security patches and updates released by the vendor to address the CVE-2021-26799 vulnerability and mitigate the associated risks effectively.